Cachisca Lake is a body of water in the Broadback River watershed in the Eeyou Istchee James Bay (municipality) area of the Nord-du-Québec, in the province of Quebec, in Canada. This lake is part of the territory of and Turgis Township. Forestry is the main economic activity of the sector. Recreational tourism activities come second. The surface of Cachisca Lake is usually frozen from early November to mid-May, however, safe ice movement is generally from mid-November to mid-April.