Lake Saint Clair

Lake Saint Clair, lake in central North America, astride the border between southeastern Michigan and southern Ontario. The nearly circular lake is 42 km (26 mi) long and has an area of 1,110 sq km (430 sq mi). A heavily trafficked component of the St. Lawrence Seaway, the lake is connected with Lake Huron to the north by the Saint Clair River and with Lake Erie to the south by the Detroit River. Although the lake's commercial fisheries have been closed because of industrial pollution, it remains a popular summer resort.