Region
United States
30
Arizona
15
Nevada
9
California
7
Colorado
7
Idaho
6
New Mexico
4
Oregon
4
San Pedro Riparian National Conservation Area
4
San Pedro Riparian National Conservation Area (Ariz.)
4
Rocky Mountains
3
Southwest, New
3
West (U.S.)
3
Wyoming
3
Connecticut
2
Great Basin
2
Salt River (Gila County and Maricopa County, Ariz.)
2
San Pedro River (Mexico and Ariz.)
2
San Pedro River Watershed (Mexico and Ariz.)
2
Shasta River
2
Shasta River (Calif.)
2
Shasta River Region
2
Southwestern States
2
Utah
2
Washington (State)
2
White River Watershed (Pierce County and King County)
2
Alaska
1
Bighorn National Forest
1
Blue River Watershed
1
Boulder
1
California, Southern
1
Canyonlands National Park
1
Cedar Creek (Modoc County, Calif.)
1
Cedar Creek Watershed (Modoc County)
1
Chesapeake Bay (Md. and Va.)
1
Colorado River Valley (Colo.-Mexico)
1
Custer County
1
Eastern Shoshone Tribe of the Wind River Reservation, Wyoming
1
Florida
1
Galveston County
1
Gila River Valley (N.M. and Ariz.)
1
Great Basin National Park
1
Great Plains
1
Gunnison River
1
Gunnison River (Colo.)
1
Hubbell Trading Post National Historic Site (Ganado, Ariz.)
1
Humboldt National Forest
1
Humboldt National Forest (Nev.)
1
Maricopa County
1
Massachusetts
1
more ...