Category: Investors

High Grade Intercepts in Caribou, Underdog and Lynx

(Montréal, April 11, 2017)  Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to announce new results from the ongoing drill program at its 100% owned Windfall Lake gold project located in Urban Township, Québec.  The current 400,000 metre drill program combines definition drilling above the Red Dog intrusion (“Red Dog”), expansion drilling above and below Red Dog, expansion drilling to the NE of the main deposit, and exploration drilling on the greater deposit and Urban-Barry Project area.

New analytical results from six drill holes in the Caribou, Underdog and Lynx zones are reported in this release and in the table below, with significant assay results including:  585 g/t Au over 2.8 metres (including 5.45 kilogram/t Au over 0.30 metres containing spectacular visible gold veinlets; main interval averages 11.5 g/t Au over 2.8 metres cut to 100 g/t) in hole OSK-W-17-743-W4;19.4 g/t Au over 7.9 metres (including 29.7 g/t Au over 4.5 metres; main interval averages 16.4 g/t Au over 7.9 metres cut to 100 g/t) in hole OSK-W-17-789;  and 24.9 g/t Au over 3.1 metres in hole OSK-W-17-W-802.   Maps showing hole locations and full analytical results are available at www.osiskomining.com. 

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t)	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-17-743-W4	796.2	799.0	2.8	585	11.5	CS1	Caribou
including	796.2	796.5	0.3	5450			Caribou
OSK-W-17-786	652.3	660.1	7.8	5.17		CS3 HW	Caribou
including	652.3	656.0	3.7	9.85			Caribou
OSK-W-17-780-W1	1074.0	1091.0	17.0	5.97		FW0	Underdog
including	1079.0	1082.8	3.8	19.7			Underdog
OSK-W-17-789	853.0	860.9	7.9	19.4	16.4	FW1	Underdog
including	853.0	857.5	4.5	29.7	24.5		Underdog
	883.9	885.9	2.0	9.15		FW1 FW	Underdog
including	884.9	885.6	0.7	24.1			Underdog
OSK-W-17-802	363.0	366.1	3.1	24.9		VNCR	Lynx
including	365.3	366.1	0.8	73.2			Lynx
	378.7	381.3	2.6	3.99		VNCR	Lynx
including	379.3	380.5	1.2	6.77			Lynx
OSK-W-17-803	137.0	139.3	2.3	5.23		HW	Lynx
including	137.0	138.5	1.5	7.74			Lynx
	169.0	171.9	2.9	19.1			Lynx

Notes:

1. True Widths for Caribou and Underdog Corridors are estimated at 65 – 80% of the reported core length interval.  True widths in the Lynx Zone are yet to be determined.  See “Quality Control” below.
2. Definitions:  HW = hanging wall;  FW = footwall.  VNCR = crustiform vein. 

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Section
OSK-W-17-743-W4	334	-64	1477.5	452651	5434237	2525
OSK-W-17-786	337	-55	718.5	452673	5434412	2625
OSK-W-17-789	316	-38	1075	452546	5434390	2500
OSK-W-17-780-W1	330	-60	1264.5	452929	5434378	2850
OSK-W-17-802	330	-54	400.5	453376	5434896	3475
OSK-W-17-803	331	-64	412.5	453305	5434943	3450

Caribou Corridor
OSK-W-17-743-W4 returned 585 g/t Au over 2.8 metres (11.5 g/t Au over 2.8 metres cut) from the CS1 Zone.  The hole is part of the 30 metre infill program in the Caribou Zone and mineralization includes two gold veinlets 2-5 millimetres thick within a semi-massive pyrite stringer.  The host rock is a strongly sericitized andesite in contact with a felsic dike.

OSK-W-17-786 returned 5.17 g/t Au over 7.8 metres from the CS3 Zone hanging wall (CS3 Zone in same hole returned 6.64 g/t Au over 4.9 metres, see March 22, 2017 press release).  The CS3 hanging wall is 3.6 metres above the CS3 Zone.  Mineralization is composed of up to 4% pyrite stringers.

Underdog Corridor
OSK-W-17-780-W1 is part of the Underdog 50 metre infill program.  The hole returned 5.97 g/t Au over 17.0 metres including 19.7 g/t Au over 3.8 metres in the FW0 zone.  Mineralization is comprised of up to 3% pyrite stringers in a strongly silica altered hosted in a felsic fragmental dike.  The intersection contains grey quartz veins, 10-15 millimetres wide, with local visible gold.  This interval is located 50 metres west of previously reported 3.3 g/t Au over 4.0 metres intersected in OSK-W-17-780 (see April 6, 2017, press release).

OSK-W-17-789 previously intersected the Caribou Corridor (see April 6, 2017, press release) and also intersected two parallel zones inside the Underdog Corridor.  New results from this hole in the Underdog Corridor include 19.4 g/t Au over 7.9 metres (16.4 g/t Au over 7.9 metres cut) and extend the FW1 Zone 50 metres west from previous intersections.  Mineralization contains up to 4% pyrite stringers and local visible gold hosted in a strongly sericitized and silicified felsic porphyry.  A second intersection associated with the FW1 footwall returned 9.15 g/t Au over 2.0 metres, including local visible gold in a semi-massive pyrite stringer.

Lynx Corridor
OSK-W-17-802 intersected two crustiform veins returning respectively 24.9 g/t Au over 3.1 metres and 3.99 g/t Au over 2.6 metres in the Lynx Corridor.  Pyrite-tourmaline stringers are composed of up to 7% pyrite and local visible gold at the vein contact.  This intersection is located 60 metres north-west of previously reported OSK-W-17-760 which returned 14.1 g/t Au over 3 meters (see January 11, 2017, press release).

OSK-W-17-803 intersected two mineralized zone in the Lynx Corridor.  The first intersection corresponds to the hanging wall of Lynx Zone, and returned 5.23 g/t Au over 2.3 metres.  Mineralization is composed of sulphide-rich silica bands including local visible gold.  The second intersection corresponds to the Lynx Zone and returned 19.1 g/t Au over 2.9 metres in the similar mineralization.  Both intersections are located 60 metres north-west of OSK-W-17-802 (described above).

Qualified Person
The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Louis Grenier, P.Geo. (OGQ 800), Project Manager of the Windfall Lake gold project, who is a “Qualified Person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

Quality Control and Reporting Protocols
True width determinations in the Caribou and Underdog zones are estimated at 65 – 80% true core lengths.  True width determinations in the Lynx Zone have yet to be determined.  Assay are uncut except where indicated, and calculated intervals are reported over a minimum length of 2 metres using a lower cutoff of 3 g/t Au. All NQ core assays reported were obtained by either 1 kilogram whole rock metallic screen/fire assay or standard 50 gram fire-assaying with AA or gravimetric finish at ALS Laboratories in Val dOr, Québec or Sudbury, Ontario. The 1 kilogram metallic screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. All samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS laboratories. Drill program design, Quality Assurance/Quality Control and interpretation of results is performed by qualified persons employing a Quality Assurance/Quality Control program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for Quality Assurance/Quality Control purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assays.

About the Windfall Lake Gold Deposit
The Windfall Lake gold deposit is located between Val-dOr and Chibougamau in the Abitibi region of Québec, Canada. The current mineral resource comprises 2,762,000 tonnes at 8.42 g/t Au (748,000 ounces) in the indicated category and 3,512,000 tonnes at 7.62 g/t Au (860,000 ounces) in the inferred category (sourced from a technical report dated June 10, 2015 entitled “Preliminary Economic Assessment of the Windfall Lake Gold Property, Québec, Canada” with an effective date of April 28, 2015, prepared in accordance with NI 43-101). The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. The bulk of the mineralization occurs in the Main Zone, a southwest/northeast trending zone of stacked mineralized lenses, measuring approximately 600 metres wide and at least 1,400 metres long. The deposit is well defined from surface to a depth of 500 metres, and remains open along strike and at depth. Mineralization has been identified only 30 metres from surface in some areas and as deep as 870 metres in others, with significant potential to extend mineralization up and down-plunge and at depth.

About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-dOr and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area (82,400 hectares), a 100% interest in the Marban project located in the heart of Québecs prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Jonpol and Garrcon deposits on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Ontario.  Osisko continues to be well financed with approximately $190 million in cash and investments.

Cautionary Note Regarding Forward-Looking Information
This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the Windfall Lake gold deposit being one of the highest grade resource-stage gold projects in Canada; the current 400,000 metre drill program at Red Dog; the significance of new results from the ongoing drill program at the Windfall Lake gold project; new analytics from the four drill holes focused on the Lynx Zone discovery; the significance of assay results presented in this press release; the type of drilling included in the drill program (definition drilling above Red Dog, expansion drilling above and below Red Dog, expansion drilling to the NE of the main deposit, and exploration drilling on the greater deposit and Urban-Barry project area); potential mineralization, including the recently discovered Lynx Zone; the potential to extend mineralization up and down-plunge and at depth at the Windfall Lake gold deposit; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities, including additional drilling proposed to be conducted to the southeast of the Lynx Zone to further evaluate the abundance and true thickness of the veins and silicified bands; the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “managements view”, “anticipates” or “does not anticipate”,  “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation, at the time it was made, involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in managements geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information please contact:
John Burzynski, President and Chief Executive Officer
Telephone: (416) 363-8653

Caribou and Underdog Infill Drilling

(Montréal, April 6, 2017).  Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to announce new results from the ongoing drill program at its 100% owned Windfall Lake gold project located in Urban Township, Québec.  The current 400,000 metre drill program combines definition drilling above the Red Dog intrusion (“Red Dog”), expansion drilling above and below Red Dog, expansion drilling to the NE of the main deposit, and exploration drilling on the greater deposit and Urban-Barry Project area.  New analytical results from five drill holes focused on infill and expansion drilling in the Caribou Corridor and Underdog Corridor are reported in this release, with significant assay results presented in the table below.

New results include:  34.1 g/t Au over 4.0 metres, 7.41 g/t Au over 10.4 metres (6.21 g/t Au over 10.4 metres cut), 10.6 g/t Au over 6.8 metres and 9.38 g/t Au over 4.0 metres in hole OSK-W-17-780; and 55.4 g/t Au over 2.6 metres (19.4 g/t Au over 2.6 metres cut) in hole OSK-W-17-743-W4.  Maps showing hole locations and full analytical results are available at www.osiskomining.com. 

Notes:

1. True Widths are estimated at 65 – 80% of the reported core length interval.  See “Quality Control” below.
2. Definitions:  HW = hanging wall;  FW = footwall.

OSK-W-17-743-W4 intersected four zones in the Underdog corridor. The first zone returned 6.88 g/t Au over 3 metres in FW1 hanging wall. The mineralization is composed of 5-7% pyrite stringers and a tourmaline-quartz vein with visible gold hosted in an altered fragmental intrusion. This intersect is part of the 50 metres spacing infill program. The second zone returned 3.21 g/t Au over 3.0 metres in the FW1 corridor, 70 metres vertically under the OBM-15-560 5.7 g/t Au over 13.0 metres (see January 28, 2016 press release). The mineralization consists of 5% pyrite stringers associated with silica altered contact area between two felsic porphyry dikes. The third zone, located in FW2 hanging wall, returned 16.6 g/t Au over 2.4 metres. The mineralization consists of up to 30% pyrite and chalcopyrite traces in the similar geological context. The last zone assayed 5.42 g/t Au over 2.0 metres in the Underdog corridor between FW2 and FW3 zones. The mineralzation is composed of 2-5% pyrite and trace of chalcopyrite associated to a porphyry dikes contact.

OSK-W-17-743-W5 tested Underdog Corridor and intersected 5.36 g/t Au over 2.5 metres in the hanging wall of FW0 in a bleached andesite containing 2% pyrite stringers. It correlates with 2.81 g/t Au over 2.0 metres in OSK-W-17-743-W3, located 70 metres to the south-west. This drill hole also intersected the FW2 zone 19.4 g/t Au over 2.6 metres (55.4 g/t Au over 2.6 metres uncut) including gold rich quartz veins 287 g/t Au over 0.5 metres. The FW2 foot wall zone was intersected 1060 metres below surface and returned 3.94 g/t Au over 2.6 metres.

OSK-W-17-780 intersected six parallel zones, one in the Caribou corridor and five in the Underdog corridor. The first returned 4.46 g/t Au over 3.4 metres 200 metres south-east of the main Caribou zone in strongly silicified andesite with disseminated pyrite. The second returned 6.21 g/t Au over 10.4 metres (7.41 g/t Au over 10.4 metres uncut). The mineralization includes up to 10% pyrite stringers, chalcopyrite, sphalerite and trace of electrum related to sericitized and silicified magmatic breccia. This new zone is located 35 metres in the hangingwall of the known FW0 Zone. The third zone, the FW0, returned 3.3 g/t Au over 4.0 metres in a sericitized and silicified fragmental porphyry dike containing 2 % pyrite stringers. This intersection extend the FW0 zone 60 metres to the east from the OBM-W-16-614 (see April 14, 2016 press release). The fourth zone, 100 metres spacing infill program on FW1, returned 10.6 g/t Au over 6.8 metres with the same lithological features. The FW3 Zone assayed 34.1 g/t Au over 4.0 metres hosted in a felsic intrusive with 1% pyrite stringers and disseminated pyrite. The last intersection is 35 metres deeper than the previous one and in strike with the FW3 zone. The analytical, results returned 9.38 g/t Au over 4.0 metres. The mineralization includes up to 10% pyrite stringers and extended the FW3 corridor 100 metres to the east from OSK-W-16-754 (see February 14, 2017 press release).

OSK-W-17-784 intersected two mineralized intervals in the hanging wall of the Wolf Zone. The first one returned 4.89 g/t Au over 3.0 metres hosted in a sericitized felsic large quartz eyes intrusive with 1 to 5 % disseminated pyrite, pyrite stringers and visible gold. The second intersection assayed 3.21 g/t Au over 5.7 metres associated with 5 to 10% pyrite stringers, local chalcopyrite and tourmaline veinlets. The mineralization is hosted in a sericitized, ankeritized and weakly slicified small quartz eyes felsic intrusive. This interval is located 20 meters to the south-west and below previously reported 17.1 g/t over 2.0 meters in OSK-W-16-708 (see August 31, 2016 press release).

OSK-W-17-789 is an infill hole testing the CS1 Zone. A 5.12 g/t Au over 7.4 metres zone was previously reported (see March 22, 2017 press release) and receipt of additional analytical results add on a new zone, 3.2 metres deeper in the hole, returning 6.39 g/t Au over 5.2 metres (7.31 g/t Au over 5.2 metres uncut). The mineralization include up to 8% pyrite stringers and trace of sphalerite associated to strongly sericite and silica altered felsic porphyry dike.

Qualified Person
The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Louis Grenier., P.Geo. Project Manager of the Windfall Lake gold project, who is a “qualified person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

Quality Control and Reporting Protocols
True widths determinations in the Caribou and Underdog zones are estimated at 65-80% of the reported core length interval. Assays are uncut except where indicated, and calculated intervals are reported over a minimum length of 2 metres using a lower cutoff of 3 g/t Au. All NQ core assays reported were obtained by either 1 kilogram whole rock metallic screen/fire assay or standard 50 gram fire-assaying with AA or gravimetric finish at ALS Laboratories in Val dOr, Québec or Sudbury, Ontario. The 1 kilogram metallic screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. All samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS laboratories. Drill program design, Quality Assurance/Quality Control and interpretation of results is performed by qualified persons employing a Quality Assurance/Quality Control program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for Quality Assurance/Quality Control purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assays.

About the Windfall Lake Gold Deposit
The Windfall Lake gold deposit is located between Val-dOr and Chibougamau in the Abitibi region of Québec, Canada. The current mineral resource comprises 2,762,000 tonnes at 8.42 g/t Au (748,000 ounces) in the indicated category and 3,512,000 tonnes at 7.62 g/t Au (860,000 ounces) in the inferred category (sourced from a technical report dated June 10, 2015 entitled “Preliminary Economic Assessment of the Windfall Lake Gold Property, Québec, Canada” with an effective date of April 28, 2015, prepared in accordance with NI 43-101). The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. The bulk of the mineralization occurs in the Main Zone, a southwest/northeast trending zone of stacked mineralized lenses, measuring approximately 600 metres wide and at least 1,400 metres long. The deposit is well defined from surface to a depth of 500 metres, and remains open along strike and at depth. Mineralization has been identified only 30 metres from surface in some areas and as deep as 870 metres in others, with significant potential to extend mineralization up and down-plunge and at depth.

About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-dOr and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area (82,400 hectares), a 100% interest in the Marban project located in the heart of Québecs prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Jonpol and Garrcon deposits on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Ontario.  Osisko continues to be well financed with approximately $190 million in cash and investments.

Cautionary Note Regarding Forward-Looking Information
This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the Windfall Lake gold deposit being one of the highest grade resource-stage gold projects in Canada; the current 400,000 metre drill program at Red Dog; the significance of new results from the ongoing drill program at the Windfall Lake gold project, including in respect of the Caribou Corridor and Underdog Corridor; new analytics from the five drill holes focused on the Caribou Corridor and Underdog Corridor; the significance of assay results presented in this press release; the type of drilling included in the drill program (definition drilling above Red Dog, expansion drilling above and below Red Dog, expansion drilling to the NE of the main deposit, and exploration drilling on the greater deposit and Urban-Barry project area); potential mineralization; the potential to extend mineralization up and down-plunge and at depth at the Windfall Lake gold deposit; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities; the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “managements view”, “anticipates” or “does not anticipate”,  “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation, at the time it was made, involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in managements geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information please contact:
John Burzynski, President and Chief Executive Officer
Telephone: (416) 363-8653

 

New High Grade Intersections in Lynx Discovery

(Montréal, April 5, 2017).  Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to announce new results from the ongoing drill program at its 100% owned Windfall Lake gold project located in Urban Township, Québec.  The current 400,000 metre drill program combines definition drilling above the Red Dog intrusion (“Red Dog”), expansion drilling above and below Red Dog, expansion drilling to the NE of the main deposit, and exploration drilling on the greater deposit and Urban-Barry Project area.  New analytical results from 3 drill holes focused on the Lynx Zone discovery are reported in this release, with significant assay results presented in the table below.

New results include:  63.8 g/t Au over 4.4 metres and 50.9 g/t Au over 4.6 metres in OSK-W-799; new analytical results have also been received from holes OSK-W-17-788 and OSK-W-792.  Significant intervals are presented below, as well as recalculations of two intervals that have been expanded:  42.1 g/t Au over 9.2 metres in OSK-W-16-792; and 17.0 g/t Au over 17.3 metres in OSK-W-788.  Maps showing hole locations and full analytical results are available at www.osiskomining.com.

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-17-788	233.0	250.3	17.3	17.0	12.8	Main	Lynx
including	236.4	236.9	0.5	153	100
including	239.0	240.0	1.0	128	100
	295.0	297.0	2.0	6.21		FW	Lynx
including	296.6	297.0	0.4	25.7
	301.0	303.0	2.0	3.76		FW	Lynx
OSK-W-17-792	309.5	318.7	9.2	42.1	25.2	Main	Lynx
including	313.3	314.2	0.9	56.0
including	315.6	317.6	2.0	162	100
OSK-W-17-799	309.3	311.2	1.9	10.6		HW	Lynx
	319.8	324.4	4.6	50.9	49.7	Main	Lynx
including	319.8	320.7	0.9	106	100
including	323.1	324.4	1.3	82.7
	339.8	344.2	4.4	63.8	41.4	FW	Lynx
including	341.5	342.3	0.8	223	100
	402.0	408.5	6.5	11.0		CV	Lynx

Notes:  Definitions:  HW = hanging wall;  FW = footwall.  PRSB = pyrite-rich silicified bands.  CV = crustiform veins.

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Section
OSK-W-17-788	331.5	-66.1	376.5	453329	5434932	3450
OSK-W-17-792	334.5	-64.0	439.5	453446	5434960	3575
OSK-W-17-799	332.5	-74.5	451.5	453481	5435037	3644

The Lynx Zone is a recently discovered corridor of gold mineralization located to the East of the main Windfall deposit mineralized zones.  To date it has been intersected at shallow depths (60 metres) and up to 330 metres below surface, over a strike length of over 300 metres and remains open laterally and at depth. The Lynx Zone was discovered as a result of the step-out drilling program which was designed to test an east-northeast magnetic low corridor containing altered porphyry dikes similar to those previously defined in the main deposit area.  Mineralization consists of a series of crustiform veins and heavily silicified, pyrite-rich alteration bands hosted in strongly silicified and sericitized rhyolite and porphyry dikes. The veins and silicified bands are intersected at various angles, including low core angles, suggesting they may represent a vein network.  Additional drilling will be conducted in a southeast direction to further evaluate the abundance and true thickness of the veins and silicified bands.  True thicknesses of reported intersections are presently unknown.

OSK-W-17-788 intersected three zones of high silicified pyrite-rich alteration bands containing 5-10% pyrite with local visible gold.  The first zone is an expansion of a previously released interval from this hole, based on receipt of additional assays (previously reported 57.0 g/t Au over 3.6 metres, see March 28, 2017 press release).  The new calculated interval averaged 17.0 g/t Au over 17.3 metres (12.8 g/t Au over 17.3 metres cut).  The second and third intersections returned 6.21 g/t Au over 2.0 metres and 3.76 g/t Au over 2.0 metres respectively, and correspond to the Lynx foot wall.  All mineralization is hosted in a sericitized and silicified rhyolite.

OSK-W-17-792 is a newly calculated expanded interval based on the receipt of additional analytical results from this hole (71.4 g/t Au over 5.4 metres, see March 28, 2017 press release).  The new calculated interval averages 42.2 g/t Au over 9.2 metres (25.2 g/t Au over 9.2 metres cut).  Mineralization is composed of silicified pyrite-rich alteration bands containing 5-20% pyrite and local visible gold hosted in a sericitized and silicified rhyolite.  This interval is located 40 metres above and 20 metres to the east of 11.3 g/t Au over 3.6 metres in previously reported OSK-W-17-790 (see March 28, 2017 press release).

OSK-W-17-799 intersected four zones 60 metres down plunge of OSK-W-17-792.  The first zone returned 10.6 g/t Au over 1.9 metres in the hanging wall.  The mineralization consists of silicified pyrite-rich bands hosted in a sericitized interval at the contact between a fragmental felsic intrusive and a mafic dike.  The main Lynx Zone returned 49.7 g/t Au over 4.6 metres (50.9 g/t over 4.6 metres uncut) in a felsic intrusive cross-cut by several highly silicified bands containing up to 25% pyrite and local visible gold. The third zone returned 41.4 g/t Au over 4.4 metres (63.8 g/t Au over 4.4 meters uncut) and corresponds to the Lynx foot wall.  The mineralization style is the same as the second zone but localized at the lower contact of the felsic intrusive.  The last zone intersected contained a crustiform vein including 5% pyrite and local visible gold.  The vein cross-cuts a mafic dike.  The interval returned 11.0 g/t Au over 6.5 metres.

Qualified Person
The scientific and technical content of this news release has been reviewed, prepared and approved by Mr.Louis Grenier., P.Geo. Project Manager of the Windfall Lake gold project, who is a “qualified person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

Quality Control and Reporting Protocols
True width determinations in the Lynx Zone have yet to be determined.  Assay are uncut except where indicated, and calculated intervals are reported over a minimum length of 2 metres using a lower cutoff of 3 g/t Au. All NQ core assays reported were obtained by either 1 kilogram whole rock metallic screen/fire assay or standard 50 gram fire-assaying with AA or gravimetric finish at ALS Laboratories in Val dOr, Québec or Sudbury, Ontario. The 1 kilogram metallic screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. All samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS laboratories. Drill program design, Quality Assurance/Quality Control and interpretation of results is performed by qualified persons employing a Quality Assurance/Quality Control program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for Quality Assurance/Quality Control purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assays.

About the Windfall Lake Gold Deposit
The Windfall Lake gold deposit is located between Val-dOr and Chibougamau in the Abitibi region of Québec, Canada. The current mineral resource comprises 2,762,000 tonnes at 8.42 g/t Au (748,000 ounces) in the indicated category and 3,512,000 tonnes at 7.62 g/t Au (860,000 ounces) in the inferred category (sourced from a technical report dated June 10, 2015 entitled “Preliminary Economic Assessment of the Windfall Lake Gold Property, Québec, Canada” with an effective date of April 28, 2015, prepared in accordance with NI 43-101). The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. The bulk of the mineralization occurs in the Main Zone, a southwest/northeast trending zone of stacked mineralized lenses, measuring approximately 600 metres wide and at least 1,400 metres long. The deposit is well defined from surface to a depth of 500 metres, and remains open along strike and at depth. Mineralization has been identified only 30 metres from surface in some areas and as deep as 870 metres in others, with significant potential to extend mineralization up and down-plunge and at depth.

About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-dOr and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area (82,400 hectares), a 100% interest in the Marban project located in the heart of Québecs prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Jonpol and Garrcon deposits on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Ontario.  Osisko continues to be well financed with approximately $190 million in cash and investments.

Cautionary Note Regarding Forward-Looking Information
This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the Windfall Lake gold deposit being one of the highest grade resource-stage gold projects in Canada; the current 400,000 metre drill program at Red Dog; the significance of new results from the ongoing drill program at the Windfall Lake gold project, including in respect of the Lynx Zone discovery; new analytics from the three drill holes focused on the Lynx Zone discovery; the significance of assay results presented in this press release; the type of drilling included in the drill program (definition drilling above Red Dog, expansion drilling above and below Red Dog, expansion drilling to the NE of the main deposit, and exploration drilling on the greater deposit and Urban-Barry project area); potential mineralization, including the recently discovered Lynx Zone; the potential to extend mineralization up and down-plunge and at depth at the Windfall Lake gold deposit; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities, including additional drilling proposed to be conducted to the southeast of the Lynx Zone to further evaluate the abundance and true thickness of the veins and silicified bands; the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “managements view”, “anticipates” or “does not anticipate”,  “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation, at the time it was made, involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in managements geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information please contact:
John Burzynski, President and Chief Executive Officer
Telephone: (416) 363-8653

New Drilling Confirms Fox Zone Discovery

(Montréal, April 4, 2017).  Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to announce new results from the ongoing drill program at its 100% owned Windfall Lake gold project located in Urban Township, Québec.  The current 400,000 metre drill program combines definition drilling above the Red Dog intrusion (“Red Dog”), expansion drilling above and below Red Dog, expansion drilling to the NE of the main deposit, and exploration drilling on the greater deposit and Urban-Barry Project area.  New analytical results from drilling focused on the Fox Zone discovery are reported in this release, with significant assay results presented in the table below.

Two drills are currently active on the Fox Zone, with a third drill expected to be added in the coming week.  The focus of the drilling is to explore the lateral extensions of the Fox Zone to the NE and SW along a magnetic low feature that is interpreted to host the mineralization.

New results include:  8.37 g/t Au over 2.8 metres in OSK-UB-17-035 and 7.22 g/t Au over 3.2 metres in OSK-UB-17-034. Maps showing the new hole locations and full analytical results are available at www.osiskomining.com.

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Section
OSK-UB-17-034	330	-45	495	448731	5435691	175W
OSK-UB-17-035	329	-45	498	448794	5435684	125W

Previously released Osisko intercepts at the Fox discovery (see press releases dated August 29, 2016 and November 23, 2016 for supplementary details):

The Fox Zone is located approximately 3.7 kilometres WNW of the main Windfall deposit mineralized zones and is included in the Urban Barry regional exploration program.  Fox was discovered by OSX-W-16-717.  The zone was discovered on a stratigraphic drill fence which was designed to investigate an ENE magnetic low corridor containing altered porphyry dikes similar to those previously defined in the main deposit area. 

Mineralization at Fox appears to be identical to the main Windfall deposit, and occurs within zones of strong texturally destructive sericite and silica alteration in bleached mafic volcanics and porphyry dikes containing pyrite stringers.  The gold mineralization at Fox is associated with porphyry dikes and occurs in both the hanging wall and the footwall of the dikes.   Additional drilling is ongoing to test lateral and depth extensions of the mineralization.

OSK-UB-17-034 tested the Fox corridor and intersected 7.22 g/t over 3.2 metres (including 22.1 g/t Au over 1.0 metre) in a fragmental volcanic rock containing 2% pyrrhotite with sericite and quartz vein fragments.  This intersect is located 150 metres ENE of previously reported hole OSK-U-16-734 (27.6 g/t Au over 3.1 metres, previously released) which corresponds with the Fox 3 mineralized zone.

OSK-UB-17-035 intersected a shallow mineralized zone, 55 metres from hole OSK-U-16-732 (8.04 g/t Au over 3 metres, previously released), returning 2.48 g/t Au over 3.2 metres in a moderately sericitized basalt with 1-3 % pyrite stringers.  This hole also intersected the Fox 3 zone which returned values of 8.37 g/t Au over 2.8 metres (including 48.0 g/t over 0.3 metres).  The zone is characterized by a fragmental porphyry dike strongly altered in silica and sericite which contains 3% pyrite stringers and visible gold.  This hole extends the Fox 3 zone by 175 metres ENE from previously reported hole OSK-U-16-734.

Qualified Person
The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Pascal Simard., P.Geo. Director of Northern Exploration for Osisko Mining Inc., who supervises the regional exploration surrounding the Windfall Lake gold project, and who is a “qualified person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

Quality Control and Reporting Protocols
True width determinations in the Fox Zone have yet to be determined.  Assay are uncut except where indicated, and calculated intervals are reported over a minimum length of 2 metres using a lower cutoff of 3 g/t Au. All NQ core assays reported were obtained by either 1 kilogram whole rock metallic screen/fire assay or standard 50 gram fire-assaying with AA or gravimetric finish at ALS Laboratories in Val dOr, Québec or Sudbury, Ontario. The 1 kilogram metallic screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. All samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS laboratories. Drill program design, Quality Assurance/Quality Control and interpretation of results is performed by qualified persons employing a Quality Assurance/Quality Control program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for Quality Assurance/Quality Control purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assays.

About the Windfall Lake Gold Deposit
The Windfall Lake gold deposit is located between Val-dOr and Chibougamau in the Abitibi region of Québec, Canada. The current mineral resource comprises 2,762,000 tonnes at 8.42 g/t Au (748,000 ounces) in the indicated category and 3,512,000 tonnes at 7.62 g/t Au (860,000 ounces) in the inferred category (sourced from a technical report dated June 10, 2015 entitled “Preliminary Economic Assessment of the Windfall Lake Gold Property, Québec, Canada” with an effective date of April 28, 2015, prepared in accordance with NI 43-101). The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. The bulk of the mineralization occurs in the Main Zone, a southwest/northeast trending zone of stacked mineralized lenses, measuring approximately 600 metres wide and at least 1,400 metres long. The deposit is well defined from surface to a depth of 500 metres, and remains open along strike and at depth. Mineralization has been identified only 30 metres from surface in some areas and as deep as 870 metres in others, with significant potential to extend mineralization up and down-plunge and at depth.

About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-dOr and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area (82,400 hectares), a 100% interest in the Marban project located in the heart of Québecs prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Jonpol and Garrcon deposits on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Ontario.  Osisko continues to be well financed with approximately $190 million in cash and investments.

Cautionary Note Regarding Forward-Looking Information
This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the significance of new results from the ongoing drill program at the Windfall Lake gold project; the expected timing, if at all, to add a third drill on the Fox Zone; the focus of the drilling to explore the lateral extensions of the Fox Zone to the NE and SW along a magnetic low feature; that such feature is interpreted to host mineralization; that mineralization at the Fox Zone appears identical to the main Windfall Lake deposit; the significance of assay results presented in this press release; the type of drilling included in the drill program (definition drilling above Red Dog, expansion drilling above and below Red Dog, expansion drilling to the NE of the main deposit, and exploration drilling on the greater deposit and Urban-Barry project area); potential mineralization; further drilling to establish the vertical continuity and plunge of the Fox 3 mineralized zone; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities; the potential continuity or extension of any mineralization, including up and down-plunge and at depth; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “managements view”, “anticipates” or “does not anticipate”,  “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation, at the time it was made, involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in managements geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information please contact:
John Burzynski, President and Chief Executive Officer
Telephone: (416) 363-8653

New High Grade Intercepts in Lynx Zone Discovery

(Montréal, March 28, 2017).  Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to announce new results from the ongoing drill program at its 100% owned Windfall Lake gold project located in Urban Township, Québec.  The current 400,000 metre drill program combines definition drilling above the Red Dog intrusion (“Red Dog”), expansion drilling above and below Red Dog, expansion drilling to the NE of the main deposit, and exploration drilling on the greater deposit and Urban-Barry Project area.  New analytical results from four drill holes focused on the Lynx Zone discovery are reported in this release, with significant assay results presented in the table below.

New results include:  71.4 g/t Au over 5.4 metres (uncut) in OSK-W-17-792; 57.0 g/t Au over 3.6 metres (uncut) and 21.1 g/t Au over 3.7 metres in OSK-W-17-788; and 21.6 g/t Au over 7.9 metres (uncut) in OSK-W-17-779.  Maps showing hole locations and full analytical results are available at www.osiskomining.com.

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t)  cut to 100 g/t	Zone	Corridor
OSK-W-17-779	268.0	275.9	7.9	21.6	16.9	CV	Lynx
including	274.3	275.0	0.7	154	100
	282.0	284.5	2.5	18.1		CV	Lynx
	298.0	300.7	2.7	15.6		CV	Lynx
including	298.9	300.0	1.1	33.2
OSK-W-17-788	236.4	240.0	3.6	57.0	36.6	PRSB	Lynx
including	236.4	236.9	0.5	153	100
and	239.0	239.5	0.5	194	100
	245.0	248.7	3.7	21.1		PRSB	Lynx
including	247.8	248.7	0.9	54.8
OSK-W-17-790	261.6	265.2	3.6	11.3		PRSB	Lynx
including	261.6	262.3	0.7	28.7
and	264.7	265.2	0.5	39.9
OSK-W-17-790	269.5	272.5	3.0	4.32		PRSB	Lynx
including	269.5	270.6	1.1	10.1
OSK-W-17-792	313.3	318.7	5.4	71.4	42.5	PRSB	Lynx
including	315.6	316.7	1.1	242.0	100

Notes:

1. True Widths currently undetermined.  See “Quality Control” below.
2. Definitions:  PRSB = pyrite-rich silicified bands.  CV = crustiform veins.

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Section
OSK-W-17-779	331	-65	796.5	453301	5434978	3450
OSK-W-17-788	331	-65	376.5	453329	5434932	3450
OSK-W-17-790	332	-64	451.5	453456	5434998	3600
OSK-W-17-792	335	-63	439.5	453446	5434960	3575

The Lynx Zone is a recently discovered corridor of gold mineralization located to the East of the main Windfall deposit mineralized zones.  To date it has been intersected at shallow depths (60 metres) and up to 330 metres below surface, over a strike length of over 300 metres and remains open laterally and at depth. The Lynx Zone was discovered as a result of the step-out drilling program which was designed to test an east-northeast magnetic low corridor containing altered porphyry dykes similar to those previously defined in the main deposit area.  Mineralization consists of a series of crustiform veins and heavily silicified, pyrite-rich alteration bands hosted in strongly silicified and sericitized rhyolite and porphyry dikes.  The veins and silicified bands are intersected at various angles, including low core angles, suggesting they may represent a vein network.  Additional drilling will be conducted to the southeast to further evaluate the abundance and true thickness of the veins and silicified bands.  True thicknesses of reported intersections are presently unknown.

OSK-W-17-779 tested the Lynx corridor and intersected 16.9 g/t Au over 7.9 metres (21.7 g/t Au over 7.9 metres uncut) followed by 18.1 g/t over 2.5 metres and 15.6 g/t Au over 2.7 metres in crustiform veins containing 1-5% pyrite and local visible gold. The veins are hosted in silicified and sericitized rhyolite. Veining was generally intersected at 20 to 40 degrees to the axis of the core and the true width of the vein system is undetermined at this time.

OSK-W-17-788 returned 36.6 g/t Au over 3.6 metres (57.0 g/t Au over 3.6 metres uncut) followed by 21.1 g/t Au over 3.7 metres in a series of sub-parallel highly silicified pyrite-rich alteration bands with local visible gold hosted in a sericitized and silicified rhyolite containing 1-5% pyrite stringers and disseminations.

OSK-W-17-790 intersected 11.3 g/t Au over 3.6 metres in a series of highly silicified pyrite-rich alteration bands hosted in a sericitized and silicified porphyry dyke containing 3-5% pyrite stringers and disseminations.

OSK-W-17-792 averaged 42.5 g/t Au over 5.4 metres (71.4 g/t Au over 5.4 metres uncut) in a series of silicified pyrite-rich alteration bands containing 5-20% pyrite and local visible gold hosted in a sericitized and silicified rhyolite. This interval is located 40 metres above and 20 metres to the east of 11.3 g/t Au over 3.6 metres in OSK-W-17-790 described above.

Qualified Person
The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Jean-Philippe Desrochers, Ph.D., P.Geo. Senior Project Manager of the Windfall Lake gold project, who is a “qualified person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

Quality Control and Reporting Protocols
True width determinations in the Lynx Zone have yet to be determined.  Assay are uncut except where indicated, and calculated intervals are reported over a minimum length of 2 metres using a lower cutoff of 3 g/t Au. All NQ core assays reported were obtained by either 1 kilogram whole rock metallic screen/fire assay or standard 50 gram fire-assaying with AA or gravimetric finish at ALS Laboratories in Val dOr, Québec or Sudbury, Ontario. The 1 kilogram metallic screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. All samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS laboratories. Drill program design, Quality Assurance/Quality Control and interpretation of results is performed by qualified persons employing a Quality Assurance/Quality Control program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for Quality Assurance/Quality Control purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assays.

About the Windfall Lake Gold Deposit
The Windfall Lake gold deposit is located between Val-dOr and Chibougamau in the Abitibi region of Québec, Canada. The current mineral resource comprises 2,762,000 tonnes at 8.42 g/t Au (748,000 ounces) in the indicated category and 3,512,000 tonnes at 7.62 g/t Au (860,000 ounces) in the inferred category (sourced from a technical report dated June 10, 2015 entitled “Preliminary Economic Assessment of the Windfall Lake Gold Property, Québec, Canada” with an effective date of April 28, 2015, prepared in accordance with NI 43-101). The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. The bulk of the mineralization occurs in the Main Zone, a southwest/northeast trending zone of stacked mineralized lenses, measuring approximately 600 metres wide and at least 1,400 metres long. The deposit is well defined from surface to a depth of 500 metres, and remains open along strike and at depth. Mineralization has been identified only 30 metres from surface in some areas and as deep as 870 metres in others, with significant potential to extend mineralization up and down-plunge and at depth.

About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-dOr and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area (82,400 hectares), a 100% interest in the Marban project located in the heart of Québecs prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Jonpol and Garrcon deposits on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Ontario.  Osisko continues to be well financed with approximately $190 million in cash and investments.

Cautionary Note Regarding Forward-Looking Information
This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the Windfall Lake gold deposit being one of the highest grade resource-stage gold projects in Canada; the current 400,000 metre drill program at Red Dog; the significance of new results from the ongoing drill program at the Windfall Lake gold project; new analytics from the four drill holes focused on the Lynx Zone discovery; the significance of assay results presented in this press release; the type of drilling included in the drill program (definition drilling above Red Dog, expansion drilling above and below Red Dog, expansion drilling to the NE of the main deposit, and exploration drilling on the greater deposit and Urban-Barry project area); potential mineralization, including the recently discovered Lynx Zone; the potential to extend mineralization up and down-plunge and at depth at the Windfall Lake gold deposit; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities, including additional drilling proposed to be conducted to the southeast of the Lynx Zone to further evaluate the abundance and true thickness of the veins and silicified bands; the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “managements view”, “anticipates” or “does not anticipate”,  “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation, at the time it was made, involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in managements geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

The securities offered under the financings of the Corporation announced on February 6, 2017 have not been registered under the U.S. Securities Act of 1933, as amended, and may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements. This press release shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of such securities in any State in which such offer, solicitation or sale would be unlawful.

For further information please contact:
John Burzynski, President and Chief Executive Officer
Telephone: (416) 363-8653

New Mineralized Zone Discovered in Main Caribou Corridor and

Caribou Corridor Extension Confirmed on 500 Metre Step Out Line

(Montréal, March 22, 2017).  Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to announce new results from the ongoing drill program at its 100% owned Windfall Lake gold project located in Urban Township, Québec.  The current 400,000 metre drill program combines definition drilling above the Red Dog intrusion (“Red Dog”), expansion drilling above and below Red Dog, expansion drilling to the NE of the main deposit, and exploration drilling on the greater deposit and Urban-Barry Project area.  New analytical results from 8 drill holes focused on infill and expansion drilling in the Caribou Corridor are reported in this release, with significant assay results presented in the table below.

Significant new results include:  15.6 g/t Au over 5.8 metres in OSK-W-16-766-W1 in a new mineralized zone discovered in the main Caribou Corridor; 15.0 g/t Au over 3.5 metres in OSK-W-17-778; and 7.21 g/t Au over 6.5 metres in OSK-W-17-787 in the newly confirmed Caribou Extension.  Maps showing hole locations and full analytical results are available at www.osiskomining.com.

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Zone	Corridor
OSK-W-17-776	797.0	803.0	6.0	6.42	Caribou	Caribou
including	797.7	800.3	2.6	10.1
OSK-W-17-766-W1	674.8	680.6	5.8	15.6	New Zone CS1 FW	Caribou
including	676.5	679.5	3.0	27.6
OSK-W-17-777	617.0	621.0	4.0	9.01	CS3	Caribou
including	618.0	619.0	1.0	18.5
OSK-W-17-778	545.0	547.7	2.7	13.5	Crustiform veins	Caribou
including	546.6	547.0	0.4	90.2
	642.7	646.2	3.5	15.0	CS1	Caribou
including	643.5	644.5	1.0	48.7
OSK-W-17-781	518.5	520.5	2.0	15.3	Crustiform veins	Caribou
including	519.5	520.5	1.0	30.4
OSK-W-17-786	664.0	668.9	4.9	6.64	CS3	Caribou
OSK-W-17-787	507.9	514.4	6.5	7.21	Caribou Extension	Caribou
including	512.6	513.6	1.0	24.1
OSK-W-17-789	526.1	533.5	7.4	5.12	CS1	Caribou
including	527.9	530.0	2.1	16.4

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Section
OSK-W-17-776	330	-57	858.5	452851	5434434	2800
OSK-W-17-766-W1	328	-55	742.5	452690	5434340	2600
OSK-W-17-777	339	-58	714.3	452678	5434499	2675
OSK-W-17-778	331	-58	700.1	452689	5434338	2600
OSK-W-17-781	332	-61	1520.0	452844	5434221	2700
OSK-W-17-786	337	-55	718.5	452673	5434412	2625
OSK-W-17-787	333	-63	1207.3	453324	5435040	3500
OSK-W-17-789	331	-58	1279.5	452546	5434390	2500

Caribou Corridor

OSK-W-17-776 tested the down-plunge extension of the Caribou Zone and intersected 6.42g/t Au over 6.0 metres. This intercept is located 115 metres down-plunge from previously reported hole OSK-W-16-753 (7.92 g/t Au over 7.5 metres). The zone consists of 1 to 5% pyrite stringers and disseminations at the contact between a porphyry and mafic volcanics.

OSK-W-17-766-W1 intersected a new zone in the Caribou Corridor with 15.6 g/t Au over 5.8 metres. This new zone, located 40 metres in the footwall of the CS1 Zone, consists of 2 to 15% pyrite stringers with several specks of visible gold. This zone was cross-cut at depth by Red Dog.

OSK-W-17-777 extended the CS3 zone by 16 metres in its down-dip extension with 9.01 g/t Au over 4.0 metres. The zone contains 15% pyrite stringers hosted in a strongly silicified and sericitized porphyry dyke.

OSK-W-17-778 is an infill hole on the CS1 zone assaying 15.0 g/t Au over 3.5 metres. The hole is located 57 metres up and to the east of previously reported hole OBM-15-560 (11.0 g/t Au over 6.1 metres). The zone contains of 10-30% pyrite stringers hosted in strongly silicified and sericitized andesite. This hole also intersected 13.5 g/t Au over 2.7 metres in a crustiform vein containing several specks of visible gold located in the hanging wall of Caribou Zone.

OSK-W-17-781 intersected 15.3 g/t Au over 2.0 metres in a zone containing 5-10% pyrite stringers and crustiform veinlets located in the footwall of a shear zone. The hole also extended the CS1 zone down-plunge by 120 metres with 3.05 g/t Au over 2.5 metres in a bleached andesite containing 5-10% pyrite stringers.

OSK-W-17-786 tested the continuity of the CS3 zone and extended the zone by another 35 metres in its down-plunge extension with 6.64 g/t au over 4.9 metres. This intercept is located 30 metres down-plunge of OSK-W-17-777 described above. Mineralization consists of 5-10% pyrite stringers and disseminations hosted in silicified and sericitized andesite.

OSK-W-17-789 is an infill hole testing the CS1 Zone. It returned 5.12 g/t Au over 7.4 metres in silicified and sericitized porphyry dyke containing 7% pyrite stringers. This new intercept is located 60 metres down plunge of previously reported hole OSK-W-16-749 (12.7 g/t Au over 5.4 metres) and 60 metres up-plunge from previously reported hole OSK-W-16-706 (8.65 g/t Au over 3.0 metres).

Caribou Corridor Extension Drilling

OSK-W-17-787 confirms high grade gold mineralization on the 500 metre step-out section testing the ENE extension of the Caribou Corridor.  The new hole intersected 7.21 g/t Au over 6.5 metres (including 24.1 g/t Au over 1 metre) in a silicified rhyolite containing 4-7% pyrite stringers and disseminations and crustiform veining. This intersection is located 60 metres above and 100 metres east of hole previously reported OSK-W-16-755 (2.1 g/t Au over 4.9 metres) which indicated the possible extension of the Caribou Corridor.  Further results are pending for this hole.

Qualified Person
The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Jean-Philippe Desrochers, Ph.D., P.Geo. Senior Project Manager of the Windfall Lake gold project, who is a “Qualified Person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

Quality Control and Reporting Protocols
True widths of the new exploration intercepts below Red Dog reported in this press release have yet to be determined. Additional drilling is planned for the immediate area which will enable the true width determination. True widths of intercepts in the zones above the Red Dog are estimated at 65-80% of the reported core length intervals.  Assays are uncut except where indicated, and calculated intervals are reported over a minimum length of 2 metres using a lower cutoff of 3 g/t Au. All NQ core assays reported were obtained by either 1 kilogram whole rock metallic screen/fire assay or standard 50 gram fire-assaying with AA or gravimetric finish at ALS Laboratories in Val dOr, Québec or Sudbury, Ontario. The 1 kilogram metallic screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. All samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS laboratories. Drill program design, Quality Assurance/Quality Control and interpretation of results is performed by qualified persons employing a Quality Assurance/Quality Control program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for Quality Assurance/Quality Control purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assays.

About the Windfall Lake Gold Deposit
The Windfall Lake gold deposit is located between Val-dOr and Chibougamau in the Abitibi region of Québec, Canada. The current mineral resource comprises 2,762,000 tonnes at 8.42 g/t Au (748,000 ounces) in the indicated category and 3,512,000 tonnes at 7.62 g/t Au (860,000 ounces) in the inferred category (sourced from a technical report dated June 10, 2015 entitled “Preliminary Economic Assessment of the Windfall Lake Gold Property, Québec, Canada” with an effective date of April 28, 2015, prepared in accordance with NI 43-101). The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. The bulk of the mineralization occurs in the Main Zone, a southwest/northeast trending zone of stacked mineralized lenses, measuring approximately 600 metres wide and at least 1,400 metres long. The deposit is well defined from surface to a depth of 500 metres, and remains open along strike and at depth. Mineralization has been identified only 30 metres from surface in some areas and as deep as 870 metres in others, with significant potential to extend mineralization up and down-plunge and at depth.

About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-dOr and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area (82,400 hectares), a 100% interest in the Marban project located in the heart of Québecs prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Jonpol and Garrcon deposits on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Ontario.  Osisko continues to be well financed with approximately $190 million in cash and investments.

Cautionary Note Regarding Forward-Looking Information
This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the significance of new results from the ongoing drill program at the Windfall Lake gold project; five new drills being added by the end of this month; the significance of assay results presented in this press release; the type of drilling included in the drill program (definition drilling above Red Dog, expansion drilling above and below Red Dog, expansion drilling to the NE of the main deposit, and exploration drilling on the greater deposit and Urban-Barry project area); potential mineralization; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities; the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “managements view”, “anticipates” or “does not anticipate”,  “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation, at the time it was made, involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in managements geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

The securities offered under the financings of the Corporation announced on February 6, 2017 have not been registered under the U.S. Securities Act of 1933, as amended, and may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements. This press release shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of such securities in any State in which such offer, solicitation or sale would be unlawful.

For further information please contact:
John Burzynski, President and Chief Executive Officer
Telephone: (416) 363-8653

(Montréal, March 15, 2017).  Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to announce new results from the ongoing drill program at its 100% owned Garrison gold project located in Garrison Township, Ontario.  The current 35,000 metre drill program is designed to further test the known Garrcon, Jonpol and 903 zones.  A total of ten new holes are reported in this release, with significant assay results presented in the table below.

Significant new results include:  10.9 g/t Au over 3.9 metres in OSK-G17-331, 13.8 g/t Au over 2.0 metres in OSK-G17-324, 1.07 g/t Au over 32.4 metres in OSK-G17-328 and 1.38 g/t Au over 26.0 metres in OSK-G16-317.

The new results have demonstrated the potential to expand the extent of known mineralization in the 903 zone and along strike west of the Garrcon zone. The ongoing drill program for 2017 will continue to follow new extensions of the mineralized zones within the Garrcon, Jonpol and 903 zones.

Maps and sections showing hole locations and complete drilling results are available at www.osiskomining.com. 

Notes:  True Widths are estimated at 65 – 80% of the reported core length interval.  See “Quality Control” below.

OSK-G16-317 was a vertical hole targeting 100 metres west of hole OSK-G16-209X in the Garrcon Deep Zone.  Drilling in the Garrcon resource intersecting shallow mineralization averaging 1.38 g/t Au over 26.0 metres.  Hole OSK-G17-317A was a wedge from hole OSK-G16-317 which did intersect the target zone, including 4.6 g/t Au over 2.0 metres and 6.4 g/t Au over 2.0 metres. 

OSK-G17-331 drilled through the Destor Porcupine Fault Zone, intersected the 903 Zone and later along the footwall of the fault zone intersected the western extension of the Garrcon Zone, including an interval averaging 10.9 g/t Au over 3.9 metres. This represents a 650 metre extension west of the defined Garrcon Zone resource area.  Additional drill holes are planned to follow up on these potentially significant new results.  The mineralization within the hole shows the same character as the Garrcon Zone with areas of strong silicification and alteration of the Temiskaming metasediments.

OSK-G17-324 targeted the western extension of the 903 Zone and intersected 13.8 g/t Au over 2.0 metres within syenite.  This hole is 500 metres west of previously reported results from drill hole OSK-G17-326 (16.7 g/t Au over 16.4 metres).

OSK-G17-328 was drilled within the central section of the 903 Zone and intersected an interval averaging 1.07 g/t Au over 32.4 metres within altered syenite.

OSK-G17-332 was drilled within the central portion of the 903 Zone intersecting shallow gold mineralization averaging 1.09 g/t Au over 17.0 metres.

OSK-G17-321, 327, 330, 335 and 342 did not return any significant intervals.

Qualified Person
The scientific and technical content of this press release has been reviewed, prepared and approved by Mr. Greg Matheson, P.Geo. Senior Project Manager of the Garrison gold project, who is a “Qualified Person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

Quality Control
True widths of the new exploration intercepts reported in this press release have yet to be determined. Additional drilling is planned for the immediate area which will enable the true width determination. Assays are uncut except where indicated, and calculated intervals are reported over a minimum length of 2 metres using a lower cutoff of 3 g/t Au. All HQ core assays reported were obtained by either whole sample rock metallic screen/fire assay or standard 30 gram fire-assaying with AA finish at SGS Minerals Services in Cochrane, Ontario. The whole sample metallic screen assay method is selected by the geologist when samples contain coarse gold or any samples displaying gold initial fire assay values greater than 4g/t. Drill program design, Quality Assurance/Quality Control and interpretation of results is performed by qualified persons employing a Quality Assurance/Quality Control program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for Quality Assurance/Quality Control purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assays

About the Garrison Project
The Garrison Project area is comprised of 214 mineral claims, 25 mining leases, and 87 patent claims encompassing approximately 8,000 hectares.

Both Garrcon and Jonpol have resource estimates that are described in a technical report prepared in accordance with NI 43-101, which was completed by a previous operator Northern Gold Mining Inc. (entitled “Technical Report on the Golden Bear Project – Garrison Property: Larder Lake Mining Division, Garrison Township, Ontario, Canada”) dated December 30, 2013, with an effective date of December 30, 2013 (the “Garrison Technical Report”). The Garrison Technical Report was prepared by A.C.A. Howe International Limited for Northern Gold Mining Inc. (a wholly-owned subsidiary of Osisko) and is available on Osiskos website at www.osiskomining.com and on SEDAR under Northern Gold Mining Inc.s issuer profile at www.sedar.com.

Resource estimates were conducted by A.C.A. Howe International Limited according to CIM standards. The Garrcon Zone estimates showed 15.1 million tonnes with an average grade of 1.07 g/t Au (521,000 oz) in measured resources; 14.1 million tonnes averaging 1.16 g/t Au (526,000 oz) in indicated resources; and 1.7 million tonnes averaging 0.72 g/t Au (39,000 oz) in inferred resources. Potential underground resources of 5.1 million tonnes averaging 3.49 g/t Au (577,000 oz) in the inferred category were also outlined. Resources were reported at a cut-off grade of 0.4 g/t Au for open pit extraction and 1.5 g/t in a bulk underground mining scenario using a gold price of US$1,250/oz.

At the Jonpol Zone, resources were estimated as 0.87 million tonnes averaging 5.34 g/t Au (150,000 oz) in the indicated category; and 1.07 million tonnes averaging 5.56 g/t Au (192,000 oz) in inferred resources. Resources were reported at a cut-off grade of 3.0 g/t Au and assume an underground extraction scenario using a gold price of US$1,250/oz.

Readers are cautioned that inferred resources have a great amount of uncertainty as to their existence and as to whether they can be mined economically. It cannot be assumed that all or any part of the inferred resources will ever be upgraded to a higher category. Mineral resources are not mineral reserves and do not have demonstrated economic viability.

Garrcon Zone
The Garrcon Zone has a shallow plunge eastward along the footwall of the Destor-Porcupine Fault Zone with the bulk of the resource in the western, more densely drilled area. The zone is exposed at surface and has potential for open pit bulk mining at an estimated overall stripping ratio of 1.8:1. There is potential for additional underground resources below the pit and along the easterly plunge of the zone, which is open for further exploration down dip and along strike.

The Garrcon shaft was sunk in 1935 and 1936 by the Consolidated Mining and Smelting Co. of Canada (“Cominco”) and the Shaft and South Zones were tested for high grade gold mineralization. Cominco drove approximately 1,430 metres of drifts and cross cuts, mining underground veins. Diamond drilling by Cominco and Lac Minerals Ltd. in the mid-to-late 1980s identified broad sections of low grade mineralization. In 2006-2007, ValGold Resources Ltd. conducted additional drilling confirming these zones. From 2009-2013 Northern Gold Mining Inc. conducted 97,000 metres of diamond drilling which delineated the current resource.

In 2014, Northern Gold Mining Inc. was granted a trial mining permit allowing the extraction of up to 150,000 tonnes. Northern Gold Mining Inc. mined 73,534 dry tonnes which was processed at the nearby Holt mill facility recovering 3,516.3 oz at an average head grade of 1.55 g/t and recovery of 95.9%. The trial production permit remains active.

Jonpol Zone
Jonpol is situated in the Munro Fault Zone, a west striking splay off the north side of the Destor-Porcupine Fault. Hosted in a shear zone tens of metres wide in altered mafic volcanic rocks, the deposit consists of four high grade gold mineralized zones (JP, JD, RP and East) over a strike length of 1.7 kilometers. Gold mineralization is hosted in quartz carbonate veins, in mafic and ultramafic host rocks, and is associated with intense albite and/or sericite alteration and pyrite mineralization.

In 1997, a 49,087 tonne bulk sample was extracted from the central part of the JP zone by Hillsborough Resources Limited with an average grade of 6.7 g/t which produced 9,476 ounces Au. From 1985-2013, over 130,000 metres of drilling was completed on the property by previous operators. Development work on the JP zone included the sinking of a 184 metre shaft as well as development of a ramp to the 150 metre level with mining on six sublevels. The Jonpol infrastructure underwent reclamation in the late 1990s and was closed out in 2001, but the existing ramp and shaft are preserved.

About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-dOr and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area (82,400 hectares), a 100% interest in the Marban project located in the heart of Québecs prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Garrcon and Jonpol zones on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Ontario.  Osisko continues to be well financed and has approximately $190 million in cash and equity investment.

Cautionary Note Regarding Forward-Looking Information
This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the ongoing drill program at the Garrison gold project; results of the current 35,000 metre drill program; the significance of new drill results reported in this press release; the ability of new drill results to demonstrate potential for expansion of the previously defined Garrcon, Jonpol and 903 mineralized zones at the Garrison project; the scope of the 2017 drill program; that the 2017 drill program will follow new extensions of these mineralized zones to further define the scale of mineralization at the Garrison project; potential mineralization; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities; the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “managements view”, “anticipates” or “does not anticipate”,  “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation, at the time it was made, involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in managements geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information please contact:
John Burzynski, President and Chief Executive Officer
Telephone: (416) 363-8653

Shallow High-Grade Mineralization Intersected on 400 Metre Step-Out in Lynx Zone

Not for Distribution to U.S. News Wire Services or for Dissemination in the United States

(Montréal, February 15, 2017).  Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to announce new results from the ongoing drill program at its 100% owned Windfall Lake gold project located in Urban Township, Québec.  The current 400,000 metre drill program combines definition drilling above the Red Dog intrusion (“Red Dog”), expansion drilling above and below Red Dog, expansion drilling to the NE of the main deposit, and exploration drilling on the greater deposit and Urban-Barry Project area.  Twelve drills are currently active on the Windfall deposit, at the Black Dog discovery, and on the greater project area.  Five additional drills will be added by the end of this month.  New analytical results from one drill hole focused on expansion and infill drilling in the Lynx Corridor are reported in this release, with significant assay results presented in the table below.

Significant new results include:  64.3 g/t Au over 2.3 metres and 19.4 g/t Au over 2.0 metres in OSK-W-16-761.  Maps showing hole location and full analytical results are available at www.osiskomining.com.

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t)  cut to 100 g/t	Zone	Corridor
OSK-W-16-761	54.5	56.5	2.0	19.4		Lynx FW	Lynx
and	64.7	67.0	2.3	71.3	64.3

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Section
OSK-W-16-761	330	-61	1387.5	453181	5434996	3375

Lynx Corridor

OSK-W-16-761, located on the 400 metre step out drill fence from the main Windfall deposit, tested the up-dip extension of the Lynx Footwall Zone, 50 metres below surface.  The hole intersected 64.3 g/t Au over 2.3 metres (71.3 g/t Au over 2.3 metres uncut) and 19.4 g/t Au over 2.0 metres in a strongly silicified magmatic breccia containing 1-3% pyrite stringers and disseminations.  This intercept is located 87 metres above previously reported OSK-W-16-755 (which returned 8.12 g/t Au over 2.0 metres) and 180 metres west of previously reported OSK-W-16-760 (which intersected 42.7 g/t Au over 9 metres cut, 95.3 g/t Au uncut over 9.0 metres at approximately 200 metres vertical depth in main Lynx Zone).  The main Lynx Zone is located to the SE of this drill hole collar and was not tested by OSK-W-16-761.

Qualified Person
The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Jean-Philippe Desrochers, Ph.D., P.Geo. Senior Project Manager of the Windfall Lake gold project, who is a “Qualified Person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

Quality Control and Reporting Protocols
True widths of the new exploration intercepts below Red Dog reported in this press release have yet to be determined. Additional drilling is planned for the immediate area which will enable the true width determination. True widths of intercepts in the zones above the Red Dog are estimated at 65-80% of the reported core length intervals.  Assays are uncut except where indicated, and calculated intervals are reported over a minimum length of 2 metres using a lower cutoff of 3 g/t Au. All NQ core assays reported were obtained by either 1 kilogram whole rock metallic screen/fire assay or standard 50 gram fire-assaying with AA or gravimetric finish at ALS Laboratories in Val dOr, Québec or Sudbury, Ontario. The 1 kilogram metallic screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. All samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS laboratories. Drill program design, Quality Assurance/Quality Control and interpretation of results is performed by qualified persons employing a Quality Assurance/Quality Control program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for Quality Assurance/Quality Control purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assays.

About the Windfall Lake Gold Deposit
The Windfall Lake gold deposit is located between Val-dOr and Chibougamau in the Abitibi region of Québec, Canada. The current mineral resource comprises 2,762,000 tonnes at 8.42 g/t Au (748,000 ounces) in the indicated category and 3,512,000 tonnes at 7.62 g/t Au (860,000 ounces) in the inferred category (sourced from a technical report dated June 10, 2015 entitled “Preliminary Economic Assessment of the Windfall Lake Gold Property, Québec, Canada” with an effective date of April 28, 2015, prepared in accordance with NI 43-101). The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. The bulk of the mineralization occurs in the Main Zone, a southwest/northeast trending zone of stacked mineralized lenses, measuring approximately 600 metres wide and at least 1,400 metres long. The deposit is well defined from surface to a depth of 500 metres, and remains open along strike and at depth. Mineralization has been identified only 30 metres from surface in some areas and as deep as 870 metres in others, with significant potential to extend mineralization up and down-plunge and at depth.

About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-dOr and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area (82,400 hectares), a 100% interest in the Marban project located in the heart of Québecs prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Jonpol and Garrcon deposits on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Ontario.  Osisko continues to be well financed with approximately $200 million in cash and investments (pro-forma after giving effect to the financings announced by the Corporation on February 6, 2017, which are expected to close on or about February 28, 2017, subject to regulatory and exchange approvals).

Cautionary Note Regarding Forward-Looking Information
This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the significance of new results from the ongoing drill program at the Windfall Lake gold project; five new drills being added by the end of this month; the significance of assay results presented in this press release; the type of drilling included in the drill program (definition drilling above Red Dog, expansion drilling above and below Red Dog, expansion drilling to the NE of the main deposit, and exploration drilling on the greater deposit and Urban-Barry project area); potential mineralization; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities; the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “managements view”, “anticipates” or “does not anticipate”,  “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation, at the time it was made, involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in managements geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

The securities offered under the financings of the Corporation announced on February 6, 2017 have not been registered under the U.S. Securities Act of 1933, as amended, and may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements. This press release shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of such securities in any State in which such offer, solicitation or sale would be unlawful.

For further information please contact:
John Burzynski, President and Chief Executive Officer
Telephone: (416) 363-8653

Not for Distribution to U.S. News Wire Services or for Dissemination in the United States

(Montréal, February 14, 2017).  Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to announce new results from the ongoing drill program at its 100% owned Windfall Lake gold project located in Urban Township, Québec.  The current 400,000 metre drill program combines definition drilling above the Red Dog intrusion (“Red Dog”), expansion drilling above and below Red Dog, expansion drilling to the NE of the main deposit, and exploration drilling on the greater deposit and Urban-Barry Project area.  Twelve drills are currently active on the Windfall deposit, at the Black Dog discovery, and on the greater project area.  Five additional drills will be added by the end of this month.  New analytical results from three drill holes focused on expansion and infill drilling in the Caribou and Underdog corridors are reported in this release, with significant assay results presented in the table below.

Significant new results include:  9.76 g/t Au over 7.3 metres in OSK-W-16-754, 7.61 g/t Au over 7.0 metres and 8.95 g/t Au over 2.1 metres in OSK-W-16-762; and 9.10 g/t Au over 2.6 metres in OSK-W-16-743-W2.  Maps showing hole locations and full analytical results are available at www.osiskomining.com.

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t)	Zone	Corridor
OSK-W-16-743-W2	1373.7	1376.3	2.6	9.10	FW2	Underdog
including	1374.5	1375.3	0.8	27.5
OSK-W-16-754	1422.7	1430.0	7.3	9.76	FW3	Underdog
including	1424.0	1425.6	1.6	34.6
OSK-W-16-762	622.0	624.0	2.0	8.89	CS1 FW	Caribou
including	623.0	624.0	1.0	17.7
OSK-W-16-762	666.0	673.0	7.0	7.61	CS3	Caribou
OSK-W-16-762	682.0	684.1	2.1	8.95	CS3 FW	Caribou
OSK-W-16-762	693.0	696.0	3.0	4.47	New	Caribou
including	694.0	695.0	1.0	7.24

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Section
OSK-W-16-743 W2	333	-64	1626.7	452651	5434237	2525
OSK-W-16-754	331	-59	1564.5	452766	5434303	2675
OSK-W-16-762	332	-56	775.5	452729	5434411	2675

Underdog Corridor

Drill holes OSK-W-16-754 and OSK-W-743-W2 expanded the mineralization in the Underdog Corridor. This sector is identified as a high priority for drilling due to its potential to quickly generate new mineral resources.  The FW3 Zone, to date identified over an area of 640 metres laterally and 730 metres vertically, remains open up and down plunge.

OSK-W-16-754 intersected 9.76 g/t Au over 7.3 metres in a moderately sericitized and silicified porphyry dike containing 4-8% pyrite stringers.  This intersection is located 160 metres down plunge from previously drilled OBM-15-564 (which returned 5.32 g/t Au over 2.1 metres) and confirms the extension of the high grade FW3 gold mineralization to a vertical depth of 1,190 metres.  This hole also indicates that the FW3 Zone remains open at depth and down-plunge.

OSK-W-16-743-W2 intersected 9.10 g/t Au over 2.6 meters, extending the FW2 Zone by 265 metres down-plunge from previously drilled OSK-W-16-743-W1 (which returned 8.13 g/t Au over 2.6 metres), and 210 metres below the previously drilled DDH OSK-W-16-743 (which returned 47.0 g/t Au over 2.6 metres; 303.1 g/t Au over 2.6 metres uncut).  Mineralization consists of traces to 10% pyrite stringers and disseminations in a strongly silicified and sericitized fragmental porphyry dike. The FW0 Zone returned 3.52 g/t Au over 2.9 metres in a strongly sericitized andesite containing 3-10% pyrite stringers and disseminations. 

Caribou Corridor

OSK-W-16-762 intersected several parallel zones of the Caribou Corridor.  The Caribou South 3 (CS3) Zone was expanded by 87 metres in its SW extension with 7.61 g/t Au over 7.0 metres at the contact between a strongly sericitized and silicified andesite and porphyry dikes.  The CS3-FW Zone intersected 8.95 g/t Au over 2.1 metres in a weakly sericitized andesite containing 2-3% pyrite stringers and disseminations.  The CS1 Zone returned 8.89 g/t Au over 2.0 metres in a weakly sericitized andesite containing 1-3% pyrite stringers.

Qualified Person
The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Jean-Philippe Desrochers, Ph.D., P.Geo. Senior Project Manager of the Windfall Lake gold project, who is a “Qualified Person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

Quality Control and Reporting Protocols
True widths of the new exploration intercepts below Red Dog reported in this press release have yet to be determined. Additional drilling is planned for the immediate area which will enable the true width determination. True widths of intercepts in the zones above the Red Dog are estimated at 65-80% of the reported core length intervals.  Assays are uncut except where indicated, and calculated intervals are reported over a minimum length of 2 metres using a lower cutoff of 3 g/t Au. All NQ core assays reported were obtained by either 1 kilogram whole rock metallic screen/fire assay or standard 50 gram fire-assaying with AA or gravimetric finish at ALS Laboratories in Val dOr, Québec or Sudbury, Ontario. The 1 kilogram metallic screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. All samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS laboratories. Drill program design, Quality Assurance/Quality Control and interpretation of results is performed by qualified persons employing a Quality Assurance/Quality Control program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for Quality Assurance/Quality Control purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assays.

About the Windfall Lake Gold Deposit
The Windfall Lake gold deposit is located between Val-dOr and Chibougamau in the Abitibi region of Québec, Canada. The current mineral resource comprises 2,762,000 tonnes at 8.42 g/t Au (748,000 ounces) in the indicated category and 3,512,000 tonnes at 7.62 g/t Au (860,000 ounces) in the inferred category (sourced from a technical report dated June 10, 2015 entitled “Preliminary Economic Assessment of the Windfall Lake Gold Property, Québec, Canada” with an effective date of April 28, 2015, prepared in accordance with NI 43-101). The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. The bulk of the mineralization occurs in the Main Zone, a southwest/northeast trending zone of stacked mineralized lenses, measuring approximately 600 metres wide and at least 1,400 metres long. The deposit is well defined from surface to a depth of 500 metres, and remains open along strike and at depth. Mineralization has been identified only 30 metres from surface in some areas and as deep as 870 metres in others, with significant potential to extend mineralization up and down-plunge and at depth.

About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-dOr and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area (82,400 hectares), a 100% interest in the Marban project located in the heart of Québecs prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Jonpol and Garrcon deposits on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Ontario.  Osisko continues to be well financed with approximately $200 million in cash and investments (pro-forma after giving effect to the financings announced by the Corporation on February 6, 2017, which are expected to close on or about February 28, 2017, subject to regulatory and exchange approvals).

Cautionary Note Regarding Forward-Looking Information
This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the significance of new results from the ongoing drill program at the Windfall Lake gold project; five new drills being added by the end of this month; the significance of assay results presented in this press release; the type of drilling included in the drill program (definition drilling above Red Dog, expansion drilling above and below Red Dog, expansion drilling to the NE of the main deposit, and exploration drilling on the greater deposit and Urban-Barry project area); potential mineralization; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities; the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “managements view”, “anticipates” or “does not anticipate”,  “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation, at the time it was made, involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in managements geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

The securities offered under the financings of the Corporation announced on February 6, 2017 have not been registered under the U.S. Securities Act of 1933, as amended, and may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements. This press release shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of such securities in any State in which such offer, solicitation or sale would be unlawful.

For further information please contact:
John Burzynski, President and Chief Executive Officer
Telephone: (416) 363-8653

(Montréal, February 1, 2017).  Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to announce new results from the ongoing drill program at its 100% owned Garrison gold project located in Garrison Township, Ontario.  The current 35,000 metre drill program is designed to further test the known Garrcon, Jonpol and 903 zones, with six drill rigs currently active on the property.  A total of four new holes are reported in this release, with significant assay results presented in the table below.

Significant new results include:  16.7 g/t Au over 16.4 metres (8.52 g/t Au over 16.4 metres cut) and 7.62 g/t Au over 2.6 metres in OSK-G17-326.

The new results demonstrate the potential to expand the extent of known mineralization in the 903 Zone. The ongoing 2017 drill program will continue to investigate extensions of the mineralized zones within the Garrcon, Jonpol and 903 zones

Maps and sections showing hole locations and complete drilling results are available at www.osiskomining.com. 

Notes:  True Widths are estimated at 65 – 80% of the reported core length interval.  See “Quality Control” below.

DDH OSK-G16-312 targeted deep mineralization within the Jonpol Zone by drilling through the Garrcon mineralized horizon.  It successfully identified a new zone of mineralization within the western portion of the Garrcon Zone.  The new mineralization is hosted within metasedimentary rocks along the south contact of an iron formation and averaged 3.63 g/t Au over 5.2 metres.  The Garrcon Zone mineralization was previously not known to extend west of the iron formation.  The hole encountered difficulties and was abandoned prior to reaching the Jonpol Zone.

DDH OSK-G16-322 tested the main 903 Zone syenite target, intersecting an anomalous interval grading 1.15 g/t Au over 23.8 metres starting at 206 metres.

DDH OSK-G17-326 targeted the main 903 Zone syenite, intersecting several large quartz veins with mineralization at the collar of the hole to a depth of 120 metres. Mineralization within the main syenite zone (associated with coarse disseminated pyrite) occurs in a shallow interval near the collar averaging 7.62g/t Au over 2.6 metres, and 16.7 g/t Au over 16.4 metres (8.52 g/t Au over 16.4 metres cut) starting at 80 metres down hole.

OSK-G17-323 did not intersect any significant mineralization.

Qualified Person
The scientific and technical content of this press release has been reviewed, prepared and approved by Mr. Greg Matheson, P.Geo. Senior Project Manager of the Garrison gold project, who is a “Qualified Person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

Quality Control
True widths of the new exploration intercepts reported in this press release have yet to be determined. Additional drilling is planned for the immediate area which will enable the true width determination. Assays are uncut except where indicated, and calculated intervals are reported over a minimum length of 2 metres using a lower cutoff of 3 g/t Au. All HQ core assays reported were obtained by either whole sample rock metallic screen/fire assay or standard 30 gram fire-assaying with AA finish at SGS Minerals Services in Cochrane, Ontario. The whole sample metallic screen assay method is selected by the geologist when samples contain coarse gold or any samples displaying gold initial fire assay values greater than 4g/t. Drill program design, Quality Assurance/Quality Control and interpretation of results is performed by qualified persons employing a Quality Assurance/Quality Control program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for Quality Assurance/Quality Control purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assays.

About the Garrison Project
The Garrison Project area is comprised of 214 mineral claims, 25 mining leases, and 87 patent claims encompassing approximately 8,000 hectares.

Both Garrcon and Jonpol have resource estimates that are described in a technical report prepared in accordance with NI 43-101, which was completed by a previous operator Northern Gold Mining Inc. (entitled “Technical Report on the Golden Bear Project – Garrison Property: Larder Lake Mining Division, Garrison Township, Ontario, Canada”) dated December 30, 2013, with an effective date of December 30, 2013 (the “Garrison Technical Report”). The Garrison Technical Report was prepared by A.C.A. Howe International Limited for Northern Gold Mining Inc. (a wholly-owned subsidiary of Osisko) and is available on Osiskos website at www.osiskomining.com and on SEDAR under Northern Gold Mining Inc.s issuer profile at www.sedar.com.

Resource estimates were conducted by A.C.A. Howe International Limited according to CIM standards. The Garrcon Zone estimates showed 15.1 million tonnes with an average grade of 1.07 g/t Au (521,000 oz) in measured resources; 14.1 million tonnes averaging 1.16 g/t Au (526,000 oz) in indicated resources; and 1.7 million tonnes averaging 0.72 g/t Au (39,000 oz) in inferred resources. Potential underground resources of 5.1 million tonnes averaging 3.49 g/t Au (577,000 oz) in the inferred category were also outlined. Resources were reported at a cut-off grade of 0.4 g/t Au for open pit extraction and 1.5 g/t in a bulk underground mining scenario using a gold price of US$1,250/oz.

At the Jonpol Zone, resources were estimated as 0.87 million tonnes averaging 5.34 g/t Au (150,000 oz) in the indicated category; and 1.07 million tonnes averaging 5.56 g/t Au (192,000 oz) in inferred resources. Resources were reported at a cut-off grade of 3.0 g/t Au and assume an underground extraction scenario using a gold price of US$1,250/oz.

Readers are cautioned that inferred resources have a great amount of uncertainty as to their existence and as to whether they can be mined economically. It cannot be assumed that all or any part of the inferred resources will ever be upgraded to a higher category. Mineral resources are not mineral reserves and do not have demonstrated economic viability.

Garrcon Zone
The Garrcon Zone has a shallow plunge eastward along the footwall of the Destor-Porcupine Fault Zone with the bulk of the resource in the western, more densely drilled area. The zone is exposed at surface and has potential for open pit bulk mining at an estimated overall stripping ratio of 1.8:1. There is potential for additional underground resources below the pit and along the easterly plunge of the zone, which is open for further exploration down dip and along strike.

The Garrcon shaft was sunk in 1935 and 1936 by the Consolidated Mining and Smelting Co. of Canada (“Cominco”) and the Shaft and South Zones were tested for high grade gold mineralization. Cominco drove approximately 1,430 metres of drifts and cross cuts, mining underground veins. Diamond drilling by Cominco and Lac Minerals Ltd. in the mid-to-late 1980s identified broad sections of low grade mineralization. In 2006-2007, ValGold Resources Ltd. conducted additional drilling confirming these zones. From 2009-2013 Northern Gold Mining Inc. conducted 97,000 metres of diamond drilling which delineated the current resource.

In 2014, Northern Gold Mining Inc. was granted a trial mining permit allowing the extraction of up to 150,000 tonnes. Northern Gold Mining Inc. mined 73,534 dry tonnes which was processed at the nearby Holt mill facility recovering 3,516.3 oz at an average head grade of 1.55 g/t and recovery of 95.9%. The trial production permit remains active.

Jonpol Zone
Jonpol is situated in the Munro Fault Zone, a west striking splay off the north side of the Destor-Porcupine Fault. Hosted in a shear zone tens of metres wide in altered mafic volcanic rocks, the deposit consists of four high grade gold mineralized zones (JP, JD, RP and East) over a strike length of 1.7 kilometers. Gold mineralization is hosted in quartz carbonate veins, in mafic and ultramafic host rocks, and is associated with intense albite and/or sericite alteration and pyrite mineralization.

In 1997, a 49,087 tonne bulk sample was extracted from the central part of the JP zone by Hillsborough Resources Limited with an average grade of 6.7 g/t which produced 9,476 ounces Au. From 1985-2013, over 130,000 metres of drilling was completed on the property by previous operators. Development work on the JP zone included the sinking of a 184 metre shaft as well as development of a ramp to the 150 metre level with mining on six sublevels. The Jonpol infrastructure underwent reclamation in the late 1990s and was closed out in 2001, but the existing ramp and shaft are preserved.

 

About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-dOr and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area (82,400 hectares), a 100% interest in the Marban project located in the heart of Québecs prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Garrcon and Jonpol zones on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Ontario.  Osisko continues to be well financed and has approximately $90 million in cash and cash equivalents as well as equity investments of approximately $50 million.

Cautionary Note Regarding Forward-Looking Information
This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the ongoing drill program at the Garrison gold project; results of the current 35,000 metre drill program; the significance of new drill results reported in this press release; the ability of new drill results to demonstrate potential for expansion of the previously defined Garrcon, Jonpol and 903 mineralized zones at the Garrison project; the scope of the 2017 drill program; that the 2017 drill program will follow new extensions of these mineralized zones to further define the scale of mineralization at the Garrison project; potential mineralization; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities; the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “managements view”, “anticipates” or “does not anticipate”,  “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation, at the time it was made, involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in managements geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information please contact:
John Burzynski, President and Chief Executive Officer
Telephone: (416) 363-8653