Wisconsin River

Wisconsin River
Wisconsin and the Wisconsin River
Country	United States
Basin features
Main source	Lac Vieux Desert 1,683 ft (513 m)
River mouth	Mississippi River near Prairie du Chien, Wisconsin
Basin size	12,280 sq mi (31,800 km2)
Physical characteristics
Length	420 mi (680 km)
Discharge	Average rate: 12,000 cu ft/s (340 m3/s) at mouth

The Wisconsin River is a tributary of the Mississippi River in the U.S. state of Wisconsin. At approximately 430 miles (692 km) long, it is the state's longest river. The river's name, first recorded in 1673 by Jacques Marquette as "Meskousing," is rooted in the Algonquian languages used by the area's American Indian tribes, but its original meaning is obscure. French explorers who followed in the wake of Marquette later modified the name to "Ouisconsin," and so it appears on Guillaume de L'Isle's map (Paris, 1718) This was simplified to "Wisconsin" in the early 19th century before being applied to Wisconsin Territory and finally the state of Wisconsin.

The Wisconsin River originates in the forests of the Lake District of northern Wisconsin, in Lac Vieux Desert near the border of the Upper Peninsula of Michigan. It flows south across the glacial plain of central Wisconsin, passing through Wausau, Stevens Point, and Wisconsin Rapids. In southern Wisconsin it encounters the terminal moraine formed during the last ice age, where it forms the Dells of the Wisconsin River. North of Madison at Portage, the river turns to the west, flowing through Wisconsin's hilly Western Upland and joining the Mississippi approximately 3 miles (4.8 km) south of Prairie du Chien.