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Great Lakes Geography

4 | Introduction to the Great Lakes

Lake Michigan highlighted in yellow.

Lake Michigan, ranked second largest of the Great Lakes according to volume, is the only Great Lake entirely within the United States. On Lake Michigan's north shore. Click for a larger image.Averaging 279 feet deep, the lake reaches 925 feet at its deepest point. Lake Michigan is approximately 118 miles wide and 307 miles long and boasts more than 1,600 miles of shoreline, including many sandy beaches.

Fun Facts
The world's largest freshwater sand dunes line the shores of Lake Michigan.

The Mackinac Bridge. Click for a larger image. Hydrologically speaking, lakes Michigan and Huron are actually "one" Great Lake, separated by the Straits of Mackinaw. The Mackinac Bridge (the "Mighty Mac") spans the straits, connecting Michigan's upper and lower peninsulas.

More about Lake Michigan

Graphics: Basin map with Lake Michigan highlighted; on Lake Michigan's north shore; the Mackinac Bridge.

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