Region
Montana
92
Fort Belknap Indian Reservation
5
Dawson County
3
Deer Lodge Valley
3
North Dakota
3
Wyoming
3
Bitterroot River Valley
2
Crow Indian Reservation
2
Flathead Indian Reservation
2
Fort Peck Indian Reservation
2
Fort Union Coal Region
2
Judith River Formation
2
Prickly Pear Creek Valley
2
Prickly Pear Creek Valley (Mont.)
2
Richland County
2
Roosevelt County
2
Rosebud County
2
Sheridan County
2
South Dakota
2
Townsend Valley
2
Armells Creek, East Fork Watershed
1
Big Sky Mine (Mont.)
1
Blaine County
1
Carbon County
1
Cascade County
1
Flathead County
1
Fort Belknap Indian Reservation (Mont.)
1
Fort Union Formation
1
Gallatin County
1
Gallatin River Valley (Wyo. and Mont.)
1
Glacier County
1
Golden Valley County
1
Idaho
1
Judith Basin
1
Judith River Watershed
1
Lakota Formation
1
Meagher County
1
Missoula Basin
1
Missouri River Watershed
1
Musselshell County
1
Northern Cheyenne Indian Reservation
1
Otter Creek Region
1
Park County
1
Pasture Creek Region
1
Plentywood
1
Powder River Basin (Wyo. and Mont.)
1
Rocky Mountains
1
Silver Bow Creek Watershed (Silver Bow County and Deer Lodge County)
1
Smith River
1
Smith River (Mont.)
1
more ...