St. Clair River topographic map
Interactive map
Click on the map to display elevation.
About this map
The river is 40.5 miles (65.2 km) long and drops 5 feet (2 m) in elevation from Lake Huron to Lake St. Clair. The flow rate averages around 182,000 cubic feet per second (5,200 m3/s), and the drainage area is 223,600 square miles (579,000 km2). This takes into account the combined drainage areas of Lakes Huron, Michigan, and Superior.