Le Sueur River

The Le Sueur River is a tributary of the Blue Earth River, 111 miles long, in southern Minnesota in the United States. Via the Blue Earth and Minnesota Rivers, it is part of the watershed of the Mississippi River, draining an area of 1,089 square miles . It is the largest tributary of the Blue Earth River, draining 31% of its watershed.
The Le Sueur River rises in Hartland Township in northwestern Freeborn County and flows initially northwardly, through the southwestern extremity of Steele County into Waseca County, then westwardly in a winding course into Blue Earth County, passing through St. Clair. It flows into the Blue Earth River southwest of Mankato, approximately three miles upstream of the Blue Earth's mouth at the Minnesota River. Its largest tributaries are the Cobb and Maple Rivers, which it collects from the south approximately six and eight miles upstream of its mouth, respectively. A minor tributary of the Le Sueur River in Waseca and Steele Counties is known as the Little Le Sueur River.

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