Region
Colorado
10
Alaska
7
Middle West
7
Arizona
6
Montana
6
Nevada
6
Wyoming
6
Idaho
4
Kansas
4
Utah
4
Appalachian Region
3
California
3
United States
3
Virginia
3
Anadarko Basin
2
Arkansas
2
Colorado River (Colo.-Mexico)
2
Great Basin
2
Illinois Basin
2
Mississippi
2
Missouri
2
New Mexico
2
Saudi Arabia
2
West (U.S.)
2
Appalachian Basin
1
Appalachian Region, Southern
1
Baca County
1
Beaverhead County
1
Bighorn River Watershed (Wyo. and Mont.)
1
Black Pine Mountains
1
Brooks Range
1
Brooks Range (Alaska)
1
Cades Cove
1
Canada
1
Cheyenne County
1
Chichagof Island
1
Clark County
1
Colfax County
1
Colorado River Watershed (Colo.-Mexico)
1
De Long Mountains
1
Eagle County
1
Eagle County Region
1
El Dorado County
1
Elko County
1
Fox Mountain (Nye County)
1
Front Range (Colo. and Wyo.)
1
Garland County
1
Grand Canyon
1
Grand Canyon (Ariz.)
1
Hot Spring County
1
more ...