Where is flathead lake in montana?

Flathead Lake (Salish: člq̓etkʷ) is a large natural lake in northwest Montana, and is the largest natural freshwater lake by surface area that is west of the source of the Mississippi River in the contiguous United States. read more

Lake Flathead Lake is the largest natural freshwater lake west of the Mississippi in the lower 48 states, with over 200 square miles of water and 185 miles of shoreline. The southern half of Flathead Lake is within the boundary of the Confederated Salish and Kootenai Tribes Flathead Reservation. read more