What is river that forms michigan ontario border?

The river that forms the border between Michigan and Ontario is the St. Clair River. The river is approximately 40 miles long, and it connects Lake Huron to Lake St. Clair. The St. Clair River is an important transportation route for the Great Lakes shipping industry, and it is also a popular recreational destination for boating and fishing. The river is known for its strong current and deep water, and it is home to a variety of fish species, including walleye, perch, and salmon. The St. Clair River has played an important role in the history and development of the Great Lakes region, and it continues to be a vital resource for both Michigan and Ontario.