The Mitchi property,100% owned, is located west of the Mitchinamecus reservoir, 100 km north of the town of Mont-Laurier and 50 km south of the railway line crossing the town of Parent. It is accessible year-round through a network of well-maintained logging and gravel roads, and a hydro-electric power substation (La Vérandrye) is located 14 km to the east.
The property covers an area of more than 300 km2 and comprises 538 individual claims.
It falls within the Category 3 lands of the Maniwaki Métis communities in the west and Manouane Atikamekw in the east, also receptive to the mining industry.

The property is located in the north‐western portion of the central metasedimentary belt of the Grenville geological province. Many gold, copper, silver and/or manganese mineralized showings have been identified to date, with many characteristics suggesting of a sediment‐hosted stratiform copper type deposit (SSC) in the Eastern portion of the property and Iron Oxide Copper Gold ore (IOCG) and skarn type deposits in the Western portion. Osisko holds a 2% NSR on 27 claims of the southern portion of the Mitchi property, outside of the sedimentary basin.

January 31, 2018 –First results of the 2017-2018 winter drilling campaign February 27, 2018 – Results of the last 8 drill holes of the 2017-2018 winter drilling campaign February 27, 2018 – Drill Section 4+00E (Surface plan here)
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April 24, 2018 – Ground Geophysical Survey of Induced Polarization (IP) on the Nasigon Grid August 8, 2018 –First results of the 2018 summer exploration campaign August 16, 2018 – First  channel sampling results of the 2018 Summer Exploration Campaign
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August 30, 2018 – First drilling results from the 2018 campaign September 17, 2018 – Results of the drilling of its June 2018 campaign in the Sherlock Corridor
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