Big Manistique Lake
General data
- Name: Big Manistique Lake
- Water system: St. Lawrence River
- Water type: Natural lake
- Progression: Manistique River -> Lake Michigan -> Lake Huron -> St. Clair River -> Lake St. Clair (North America) -> Detroit River -> Lake Erie -> Niagara River -> Lake Ontario -> St. Lawrence River -> Gulf of St. Lawrence -> Atlantic Ocean -> Planet Earth
- Climates: Continental
- Continents: North America
- Countries: United States of America
Manistique Lake, locally called Big Manistique Lake to distinguish it from the other lakes in the Manistique Lakes system, is a 10,130-acre (4,100 ha) lake in the Upper Peninsula of the U.S. state of Michigan. Approximately 6.5 miles (10.5 km) long and 4 miles (6.4 km) wide, it is one of the largest lakes in the Upper Peninsula. Elevated 686 feet (209 m) above sea level and 105 feet (32 m) above Lake Michigan, Manistique Lake drains into the larger lake through a marshy outlet on the west end of the lake that forms one source of the Manistique River. Relatively shallow, the lake's deepest point is only 20 feet (6.1 m) below the water surface. The average depth is 10 feet (3.0 m).