Museum of the Plains Indian, 19 Museum Loop (US Hwys 2 and 89 West), 48.556696°, -113.022839°, +1 406 338-2230. Jun-Sep: 9AM-4:45PM daily. Oct-May: M-F 10AM-4:30PM. Jun-Sep: $5 adults, $4 seniors, $1 children 6-12, free for children under 6 and for shop customers. Oct-May: free for everyone