Analysis of information sources in references of the Wikipedia article "Wild Horse Island" in English language version.
The Island, comprising 2,165.09 acres [876.18 ha], is in Lake County, Montana, and also within the boundaries of the Flathead Indian Reservation.
The old horse's death leaves five mares and one gelding, a population that still outweighs what is technically allowed by Wild Horse Island State Park's management plan – a maximum of five wild horses to run free on the island's 2,164 acres [876 ha].
Although 56 privately owned parcels still exist along the shore areas, most of the island (2,163 acres [875 ha]) is now a state park.
Flathead Lake is the largest natural freshwater lake west of the Mississippi in the lower 48 states, with over 200 square miles [520 km2] of water and 185 miles [298 km] of shoreline.
The Island, comprising 2,165.09 acres [876.18 ha], is in Lake County, Montana, and also within the boundaries of the Flathead Indian Reservation.