The state's rivers are generally small, short and shallow, and few are navigable. The principal ones include the Detroit RiverSt. Marys River, and St. Clair River which connect the Great Lakes; the Au SableCheboygan, and Saginaw, which flow into Lake Huron; the Ontonagon, and Tahquamenon, which flow into Lake Superior; and the St. JosephKalamazooGrandMuskegonManistee, and Escanaba, which flow into Lake Michigan. The state has 11,037 inland lakes—totaling 1,305 square miles (3,380 km2) of inland water—in addition to 38,575 square miles (99,910 km2) of Great Lakes waters. No point in Michigan is more than six miles (9.7 km) from an inland lake or more than 85 miles (137 km) from one of the Great Lakes.[53]