Region
South Dakota
159
Fall River County
43
Custer County
25
Black Hills (S.D. and Wyo.)
13
Pennington County
13
North Dakota
11
Wyoming
11
Harding County
10
Nebraska
10
Shannon County
6
Montana
5
Badlands National Park
4
Badlands National Park (S.D.)
3
Jackson County
3
Lawrence County
3
Minnesota
3
Pierre Region
3
Homestake Mine (S.D.)
2
Hughes County
2
Iowa
2
Middle West
2
Mount Rushmore National Memorial
2
Weston County
2
Wind Cave National Park
2
Wind Cave National Park (S.D.)
2
Atlantic States
1
Bad Lands
1
Berkshire County
1
Butte County
1
Charles Mix County
1
Cheyenne River Indian Reservation
1
Clifton
1
Clifton Region
1
Clifton region
1
Colorado
1
Colorado Plateau
1
Custer County (S.D.)
1
Dakota Aquifer
1
Dewey region
1
Douglas County
1
Fanny Peak area
1
Galena-Roubaix District
1
Jewel Cave National Monument
1
Jewel Cave National Monument (S.D.)
1
Kampeska, Lake
1
Lead
1
Louisiana
1
Manson Region
1
Massachusetts
1
Meade County
1
more ...