ChamberMaster Template Big Sky Country National Heritage Area Natural Resources Big Sky Country National Heritage Area Visit Website PO Box 1323 Great Falls, MT 59403 (406) 761-7319 About Map About We work towards development of a National Heritage Area in the Missouri River Basin corridor area in Central Montana to assist in performing feasibility studies of the various resources of that area. What's Nearby? Distance: 5 10 15 20 25 50 mi.