Region
Colorado
31
United States
21
Oklahoma
6
Wyoming
4
Montana
2
Sweetwater County
2
Utah
2
Appalachian Region
1
California
1
Carbon County
1
Europe
1
Fremont County
1
Fresno County
1
Idaho
1
Mariana Islands
1
Middle East
1
Monterey County
1
Nigeria
1
North America
1
North Carolina
1
Olympic National Park (Wash.)
1
Persian Gulf States
1
San Benito County
1
Smith County
1
South Africa
1
Tennessee
1
Texas
1
Thurston County
1
Ukraine
1
Van Zandt County
1
Virginia
1
Washington (State)
1
West Virginia
1
Western Cape
1
Weston County
1