Opus One Gold Corporation engages in the acquisition, exploration, and evaluation of mineral properties primarily in Canada. It explores for gold and base metals. The company holds 100% interests in the Courville project situated in Courville Township, Quebec; La Grande property that consists of 3 claim blocks covering an area of 1,541 hectares located within the La Grande lithium exploration district; and Wemindji property that comprises 1 claim block covering an area of 2,590 hectares located in James Bay, Quebec. It has an option to acquire 100% interests in the Noyell property situated in the Northern Abitibi Greenstone Belt, Quebec. The company was formerly known as Opus One Resources Inc. and changed its name to Opus One Gold Corporation in October 2020. Opus One Gold Corporation was incorporated in 1979 and is headquartered in Saint-Lambert, Canada.