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Lake Saint Clair
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Lake Saint Clair

lake, North America
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Lake Saint Clair, expansive shallow basin, forming part of the boundary between Michigan, U.S., and Ontario, Can. Roughly circular, with a surface area of 467 square miles (1,210 square km), it connects with the St. Clair River and Lake Huron (north) and with the Detroit River and Lake Erie (south). It is 26 miles (42 km) long (north to south), and 24 miles (39 km) wide (east to west) and has a mean surface altitude of 573 feet (175 m). The lake’s drainage basin covers an area of 7,420 square miles (19,220 square km). Its northeastern shoreline is marked by the large delta of the St. Clair River, with seven channels. St. Lawrence Seaway shipping is afforded a minimum channel depth of 27 feet (8 m), and the lake region forms a popular summer recreation area. Some of the wealthiest suburbs of Detroit lie on the western shore, but there are no important ports on the lake.

The French explorer Louis Jolliet was believed to be the first European to visit the lake area (1669); but some credit the discovery to two French missionaries (1670). The lake and the St. Clair River were named by the French explorers Robert Cavelier, sieur de La Salle, and Father Louis Hennepin, who arrived on St. Clair’s Day in 1679.