Osisko Mining Increases Scale of Ongoing Drill Program at Windfall Lake Gold Project

Osisko Mining Inc.("Osisko" or the "Corporation") is pleased to announce that it is increasing the scale of the ongoing drill program at its 100% owned Windfall Lake gold project located in the Urban Township, Québec.

Since late October 2015, Osisko has drilled approximately 115,000 metres as part of an originally announced 50,000 metre program (expanded twice to the current 150,000 metre drilling campaign) on the Windfall Lake gold deposit and surrounding exploration targets in Urban and Barry Townships. Exploration success in the initial 150,000 metre program has included:

• An upgraded geological interpretation of the Windfall deposit which is leading to a significantly expanded and still growing footprint for the previously known area of mineralization;

• the discovery of several significant new zones of mineralization (including Wolf Zone and the recently announced new shallow high-grade zone (known as the Lynx Zone) discovered on the 600 metre extension fence);

• the recently announced 600 metre NE extension of the main corridors of mineralization (Caribou, Zone 27, Wolf and Underdog); and

• two new discoveries in the surrounding area (Fox and Black Dog).

Additional drills have also recently commenced regional exploration on a bank of exploration targets developed from grass-roots exploration over the past year.