The Northern Cheyenne Indian Reservation (Tsėhéstáno in Cheyenne, formerly named the Tongue River Indian Reservation) is home of the federally recognized Northern Cheyenne Tribe. Located in southeastern Montana, the reservation is approximately 444,000 acres in size and home to approximately 5,000 Cheyenne people. The tribal and government headquarters are in Lame Deer, which is also the home of the annual Northern Cheyenne Pow wow.