Black Lake is a glacial lake in the Mackenzie River drainage basin in northern Saskatchewan, Canada. It is about 55 kilometres (34 mi) long, 17 kilometres (11 mi) wide, has an area of 464 km2 (179 sq mi), and lies at an elevation of 281 metres (922 ft). The primary inflows are the Chipman River, Cree River, Fond du Lac River, and Souter River; the primary outflow is Fond du Lac River, which flows via the Mackenzie River into the Arctic Ocean.