page_title: Lake Superior
section_title: Tributaries and outlet
hierarchical_section_title: Lake Superior / Hydrography / Tributaries and outlet
caption_attribution_description: English: Map of the Lake Superior watershed.
context_page_description: Lake Superior is the largest of the Great Lakes of North America, the world's largest freshwater lake by surface area, and the third largest freshwater lake by volume. It is shared by the Canadian province of Ontario to the north, the U.S. state of Minnesota to the west, and Wisconsin and the Upper Peninsula of Michigan to the south. The farthest north and west of the Great Lakes chain, Superior has the highest elevation of all five great lakes and drains into the St. Mary's River, which flows into Lake Huron.
context_section_description: Lake Superior is fed by more than 200 rivers, including the Nipigon River, the St. Louis River, the Pigeon River, the Pic River, the White River, the Michipicoten River, the Bois Brule River and the Kaministiquia River. Lake Superior drains into Lake Huron via the St. Marys River. There are rapids at the river's upper (Lake Superior) end, where the river bed has a relatively steep gradient. The Soo Locks enable ships to bypass the rapids and to overcome the 25-foot (8 m) height difference between Lakes Superior and Huron.
caption: Lake Superior basin
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