Flathead Lake is the largest natural freshwater lake in the western United States, located in Montana. It covers approximately 197 square miles and is known for its stunning blue waters and surrounding mountainous landscapes. The lake is fed by the Flathead River and is a popular destination for recreational activities such as boating, fishing, and swimming. The lake is part of the Flathead National Forest and is home to diverse wildlife, including various fish species like trout and whitefish. It also features several islands, with Wild Horse Island being the most notable, providing a habitat for wild horses and other wildlife.