Region
United States
22
West (U.S.)
17
Wyoming
6
Arizona
4
Colorado
4
Montana
3
Texas
3
Asia, Central
2
Great Basin
2
Great Plains
2
Apache-Sitgreaves National Forest
1
California
1
Canada
1
China
1
Coconino National Forest
1
Colorado National Monument
1
Colorado National Monument (Colo.)
1
Grand Canyon-Parashant National Monument
1
Hulunbuir Shi
1
Illinois
1
J.A. Ranch (Tex.)
1
Navajo Indian Reservation
1
New Mexico
1
Northwest, Canadian
1
Northwest, Pacific
1
Oklahoma
1
San Luis Valley (Colo. and N.M.)
1
Tonto National Forest
1
Utah
1
Wasatch National Forest (Utah and Wyo.)
1