The Huron River is located in Southeast Michigan, rising out of the Huron Swamp in northern Oakland County and flowing into Lake Erie on the boundary between Wayne County and Monroe County. The Huron River is a typical Southeast Michigan stream; mud banks, slow stream flow and a low gradient define this river. It runs 136 miles (219 km) through the following counties, in order from the headwaters to its mouth, Oakland, Livingston, Washtenaw, Wayne, and Monroe. There are 24 major tributaries totaling about 370 miles (600 km) in addition to the mainstream. The Huron River watershed drains 908 square miles (2,350 km2). It is the only state-designated Country-Scenic Natural River in southeast Michigan. This includes 27.5 miles (44.3 km) of the mainstream, plus an additional 10.5 miles (16.9 km) of three tributaries.