The Bitterroot Salish are a Salish-speaking group of Native Americans, and one of three tribes of the Confederated Salish and Kootenai Tribes of the Flathead Nation in Montana. The Flathead Reservation is home to the Kootenai and Pend d'Oreilles tribes also. Bitterroot Salish or Flathead originally lived in an area west of Billings, Montana extending to the continental divide in the west and south of Great Falls, Montana extending to the Montana–Wyoming border. From there they later moved west into the Bitterroot Valley. By request, a Catholic mission was built here in 1841. In 1891 they were forcibly moved to the Flathead Reservation.

Montana is a landlocked state in the Mountain West subregion of the Western United States. It borders Idaho to the west, North Dakota to the east, South Dakota to the southeast, Wyoming to the south, and the Canadian provinces of Alberta, British Columbia, and Saskatchewan to the north. It is the fourth-largest state by area, the eighth-least populous state, and the third-least densely populated state. Its capital is Helena, while the most populous city is Billings. The western half of the state contains numerous mountain ranges, while the eastern half is characterized by western prairie terrain and badlands, with smaller mountain ranges found throughout the state.