Mr. John Burzynski reports

OSISKO CONFIRMS ODYSSEY UNDERGROUND BULK TONNAGE TARGET AT CANADIAN MALARTIC

Comprehensive compilation of Osisko Mining Corp.'s Odyssey target has outlined potential for a wide, bulk-tonnage underground deposit. The Odyssey target is located approximately 700 metres east of Jeffrey zone along the Cadillac-Larder Lake fault (CLLF) and is approximately 4.5 kilometres from the Canadian Malartic mill complex.

Further to initial disclosure in the Feb. 7, 2014, press release, Odyssey consists of two zones (North Odyssey and South Odyssey), located at vertical depths of 400 to 1,000 metres on the north and south margins, respectively, of a 200-metre-to-300-metre-wide, subvertical porphyry intrusion that is similar to the Canadian Malartic porphyry. The attached table summarizes historical drill results from the Odyssey zones (initially discovered in 1988 to 1990 from Lac Minerals drilling), as well as recent holes drilled by Osisko (DDH ODY11-2404 and ODY14-2480).

Hole No.               Zone        From          To      Length          Au 
                                     (m)         (m)         (m)       (g/t)
 
EM90-21               South       543.5       564.8        21.3        2.75
and                               633.4       671.5        38.1        3.03
EM90-23A              South       487.1       529.7        42.6        2.53
ODY14-2480            South       545.0       587.7        42.7        2.50
EM90-25               South       479.8       500.5        20.7        2.29
ODY11-2404            South       928.0       935.5        7.50        7.19
EM90-21               North      1128.7      1198.8        70.1        2.12
EM90-23A              North       985.4      1037.2        51.8        1.83
EM90-27               North       822.4       835.7        13.3        2.49
EM88-17             (centre)      782.4       807.1        24.7        1.90
and                               863.2       877.2        14.0        6.45

DDH ODY14-2480 intersected the South Odyssey zone within five metres of DDH EM90-23A and produced a similar gold intersection, confirming historical Lac Minerals results. DDH ODY11-2404 and ODY14-2480 will be deepened to cross the porphyry intrusion and intersect the North Odyssey zone along the northern margin of the porphyry. DDH EM88-17 is a historical vertical hole that intersected mineralization near the centre of the porphyry intrusion, suggesting potential of additional gold zones within the porphyry.

Drill intersections into the South Odyssey zone span a vertical depth of 400 metres and a strike length of 150 metres. Geometry and true thickness of this zone are presently unknown. The three drill intersections into the North Odyssey zone span a vertical depth of 350 metres and a strike length of 400 metres. The geology suggests a tabular zone at the porphyry-volcanic contact dipping steeply to the south with a true thickness of 10 metres to 60 metres. Mineralization in both Odyssey zones consists of quartz-pyrite vein stockworks in potassic-altered porphyry, similar to that in the South Barnat deposit to the west.

The Odyssey zones are of interest from an underground bulk-tonnage mining perspective, since mining costs in wide zones of mineralization (minimum 20 metres width) have been significantly reduced in a number of mines in recent years, allowing for mining of lower-grade ore such as at Goldex near Val d'Or, where Agnico Eagle reported fourth-quarter 2013 average grades of 1.35 grams per tonne gold.

Two drills are currently active on the Odyssey zones. The objective is to define the overall size and geometry of both zones to vertical depths of approximately 1,300 metres. Specifically on the North Odyssey zone, the target is a mineralized tabular body measuring 450 metres along strike, 600 metres in vertical depth with an average true thickness of 40 metres at an average grade between 2.0 g/t to 2.5 g/t gold.

Reported historical assays are believed to be reliable, but no details of analytical nor quality assurance/quality control procedures are available. All reported Osisko core assays were obtained by standard 50-gram fire assaying AA finish or gravimetric finish on split NQ core from ALS Chemex laboratories in Val d'Or, Que., an ISO/IEC guideline 17025-accredited facility. Reported drill core weighted averages were calculated using a minimum of 1.0 g/t Au over successive intervals with maximum contiguous internal dilution length of five metres. All high assays were capped at 20 g/t Au. Lost core intervals, constituting less than 0.5 per cent of reported intervals within mineralized intersections, were all less than one metre long, and incorporated as the average grade of adjacent intervals above and below in all length-weighted calculations. Osisko follows strict QA/QC protocol measures in keeping with industry standards and regulatory reporting requirements. Robert Wares, DSc, PGeo, senior vice-president, exploration and resource development, for Osisko, is the qualified person who has reviewed this news release and is responsible for the technical information reported herein, including verification of the data disclosed.

Reject the inadequate Goldcorp Inc. offer

As previously disclosed, the Osisko board of directors has unanimously recommended that Osisko shareholders reject the hostile takeover bid initiated by Goldcorp and not tender their Osisko shares to the Goldcorp offer. The Osisko board determined that the Goldcorp offer fails to adequately compensate Osisko shareholders for, among others things, the strategic value of Osisko's world-class asset base, the significant upside potential of Osisko's Canadian Malartic mine or the increased risk inherent in Goldcorp common shares. The full basis for the Osisko board's recommendation is available in a directors circular, a copy of which is available on the company's website.

Shareholders who have questions or who may have already tendered their shares to the Goldcorp offer and wish to withdraw them, may do so by contacting the company's information agent, Laurel Hill Advisory Group.

We seek Safe Harbor.