Cass Lake is a glacially-formed lake in north central Minnesota in the United States. It is approximately 10 mi (16 km) long and 7 mi (11 km) wide, located in Cass and Beltrami counties, within the Chippewa National Forest and the Leech Lake Indian Reservation, adjacent to its namesake city of Cass Lake. In the Ojibwe language, it is called Gaa-miskwaawaakokaag (where there are many red cedar), and was known to early explorers and traders in French as Lac du Cedre Rouge, and English as Red Cedar Lake.