Lake Itasca

Lake Itasca is a small glacial lake in northern Minnesota recognized as the principal source of the Mississippi River. Its outlet begins the river’s long course to the Gulf of Mexico.

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Mississippi River: The major North American river flowing from Minnesota to the Gulf of Mexico. Lake Itasca’s outlet is traditionally identified as the river’s headwaters.
Nicollet Creek: The short stream flowing from Lake Itasca toward the upper Mississippi River. It carries water out of the lake and marks the river’s conventional beginning.
Itasca State Park: A Minnesota state park established in 1891 to protect Lake Itasca and its surrounding forests. The park preserves the lake and its outlet as a public landmark.
Headwaters: The source region of a river, including its originating streams, springs, or lakes. Lake Itasca is the best-known named landmark in the Mississippi’s headwaters.
Glacial lake: A lake formed or reshaped by glaciers and their deposits. Retreating glaciers shaped the basin that holds Lake Itasca.
Mississippi River watershed: The land area whose surface waters drain into the Mississippi River and its tributaries. Lake Itasca sits at the upper end of this vast drainage network.
Mississippi Headwaters State Forest: A Minnesota state forest protecting lands near the upper Mississippi River. Its forests form part of the landscape surrounding the lake’s headwaters.
Mississippi River Commission: A United States federal agency responsible for advising on Mississippi River improvement and management. The river whose source is associated with Itasca became a focus of federal navigation policy.
Henry Schoolcraft: An American geographer and explorer who identified Lake Itasca as the Mississippi’s source in 1832. His expedition established the lake’s lasting claim as the river’s source.
Mississippi River basin: The drainage basin encompassing the Mississippi River and its tributaries. Water leaving Itasca eventually joins the basin’s downstream river network.