Region
Colorado
178
Utah
160
Wyoming
98
United States
84
New Mexico
77
Arizona
63
Alaska
60
San Juan County
50
Montana
40
South Dakota
40
Montrose County
39
Colorado Plateau
38
West (U.S.)
37
Idaho
34
California
30
Nevada
30
Jefferson County
22
Texas
19
Sweetwater County
17
Grand County
15
San Miguel County
15
Florida
14
Carbon County
13
McKinley County
13
Pennsylvania
12
Emery County
11
Johnson County
11
North Dakota
11
Tennessee
11
Fall River County
9
Gila County
9
Nebraska
9
Brazil
8
Campbell County
8
Fremont County
8
Grant County
8
Harding County
8
Juab County
8
Kansas
8
Kern County
8
Mesa County
8
Mora County
8
Natrona County
8
Washington (State)
8
Black Hills (S.D. and Wyo.)
7
Garfield County
7
Monument Valley (Ariz. and Utah)
7
Powder River Basin (Wyo. and Mont.)
7
Sandoval County
7
Seward Peninsula
7
more ...