Claim: Wild Horse Island has a total land area of 2,163 acres (875 ha) and is located in Flathead Lake, which is the 79th largest of the natural freshwater lakes in the world.
Evidence: 2,163 acres (875 ha) Flathead Lake 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 Missouri River in the contiguous United States.