Osisko Development Corp. announced drilling results from the 200,000-meter 2021 exploration and category conversion drill program campaign at its Cariboo Gold Project ("Cariboo") in central British Columbia. A total of ten diamond drill rigs are currently at Cariboo. Drilling Summary: 85,000 meters have been drilled on Cariboo in 2021 designed to infill and expand known vein corridors. Assay results have been reported for the first 11,600 meters. The results for the remaining 73,400 meters are pending. Recent assay results include holes IM-21-012 to IM-21-023. Drillhole IM-21-014 tested both Shaft and Valley Zones, intersected multiple mineralized vein corridors in both zones, and within the Jack of Clubs fault. This shows continuous mineralization and expansion potential including 4.74 g/t Au over 5.45 meters in the Shaft Zone, 10.15 g/t Au over 0.85 meters in the Jack of Clubs Fault, and 14.64 g/t Au over 7.20 meters in the Valley Zone. Mosquito Creek assays included 15.90 g/t Au over 8.60 meters in hole IM-21-023 with multiple high-grade samples. Detailed drilling results, a drill hole location plan map and vertical cross section are presented at the end of this release. Recent Drilling Highlights: 15.89 g/t Au over 6.00 meters in hole IM-21-013 including; 79.50 g/t Au over 1.10 meters; 14.64 g/t Au over 7.20 meters in hole IM-21-014 including; 83.80 g/t Au over 0.80 meter; 7.66 g/t Au over 4.25 meters in hole IM-21-017; 4.63 g/t Au over 6.60 meters in hole IM-21-017 including; 31.10 g/t Au over 0.90 meter; 56.35 g/t Au over 2.50 meters in hole IM-21-018 including; 98.00 g/t Au over 1.10 meters; 6.25 g/t Au over 5.30 meters in hole IM-21-020; 9.49 g/t Au over 10.75 meters in hole IM-21-020; 15.90 g/t Au over 8.60 meters in hole IM-21-023 including; 42.20 g/t Au over 0.75 meter. Mineralized quartz veins on Cariboo are overall sub-vertical dip and northeast strike. Vein corridors are defined as a high-density network of mineralized quartz veins within the axis of the last folding event's folds and hosted within a brittle meta-sandstone or calcareous meta-sandstone. Vein corridors are modelled at a minimum thickness of 2.0 meters and average about 4.5 meters true width. Individual mineralized veins within these corridors have widths varying from centimeters to several meters and strike lengths from a few meters to over 50 meters. These corridors have been defined from surface to a vertical depth averaging 300 meters and remain open for expansion at depth and along strike. Gold grades are intimately associated with quartz vein-hosted pyrite as well as pyritic, intensely silicified wall rock haloes in close proximity to the veins. True widths are estimated to be 60% to 75% of reported core length intervals. Intervals not recovered by drilling were assigned zero grade. Top cuts have not been applied to high grade assays.