What body of links lake superior an Lake Huron?

Lake Superior and Lake Huron are connected by the St. Marys River, which flows from Lake Superior into Lake Huron. This river serves as the primary waterway linking the two Great Lakes, facilitating the flow of water and navigation between them. Additionally, the Soo Locks near Sault Ste. Marie, Michigan, enable ships to transit between the two lakes by managing the elevation differences.