Which lake is the only Great Lake located entirely within the United States?

Lake Michigan is the only Great Lake that is located entirely within the United States, making it a unique geographical feature among its counterparts. Its shores are lined with cities such as Chicago, Milwaukee, and Grand Rapids, all located in the U.S., and it serves as an important recreational and economic resource for those states. In contrast, other Great Lakes are border lakes, meaning they are shared between the U.S. and Canada; for example, Lakes Superior, Huron, and Erie each have significant portions that lie within Canadian territory. This distinction emphasizes Lake Michigan's exclusive geographic status within the U.S. borders.