Region
Wyoming
Sweetwater County
4
Johnson County
3
Utah
3
Carbon County
2
Fremont County
2
Natrona County
2
Campbell County
1
Caribou County
1
Colorado
1
Crook County
1
Granite Mountains
1
Idaho
1
Lincoln County
1
Lusk Region
1
Powder River Basin (Wyo. and Mont.)
1
Pumpkin Buttes
1
Red Desert
1
Rich County
1
Shirley Basin
1
Wind River Basin
1