It's the only Great Lake entirely within the U.S.
[DOC] [TLE] Great Lakes - Wikipedia [PAR] Lake Michigan is the only one of the Great Lakes that is located entirely within the 
United States; the others form a water boundary between the United States... [DOC] [TLE] Great Lakes facts, information, pictures | Encyclopedia.com articles ... [PAR] The Great Lakes waterbody is so large that its natural features can be seen ... 
Lake Michigan is located entirely within the United States, while the other four ... 
ships could reach Detroit, Michigan by covering only 5,911 kilometers (3,673 
miles).