Lake Superior, the largest body of fresh water in the world, in located in east central North America, bounded on the north and east by Ontario, on the south by Michigan and Wisconsin, and on the northwest by Minnesota.
The deepest and westernmost of the five Great Lakes, it is 563 km (350 mi) long and has a surface area of about 82,100 sq km (31,700 sq mi); about two-thirds of the lake is in the United States.
Lake Superior has an irregular coastline, with a number of large bays; Keweenaw Peninsula, in Michigan, projects far into the lake. The northern lakeshore is fringed by bold, rocky cliffs, some rising 305 m (1000 ft) above the water surface. Near Munising, Michigan, on the southeastern shore, are the Pictured Rocks, multicolored sandstone cliffs, 15 to 91 m (50 to 300 ft) high, which in many places present fantastic forms. Several large forests border the lake, which receives many small streams, such as the Nipigon River, from the north, and the St. Louis River, from the west.
The lake drains into Lake Huron, to the southeast, through the Saint Marys River, which is navigable via the Sault Sainte Marie Canals. Lake Superior has several large islands, notable among them Saint Ignace Island and Michipicoten Island, Ontario; Isle Royale, Michigan; and the Apostle Islands, Wisconsin.