Region
Colorado
15
Colorado River Watershed (Colo.-Mexico)
6
Utah
5
West (U.S.)
5
Colorado Plateau
2
Great Basin
2
Paradox Basin
2
Rocky Mountains
2
San Juan Mountains (Colo. and N.M.)
2
Arizona
1
Canyonlands National Park
1
Colorado River (Colo.-Mexico)
1
Colorado River Valley (Colo.-Mexico)
1
Cripple Creek
1
Denver Basin
1
Four Corners Region
1
Grand Canyon Region
1
Grand Canyon Region (Ariz.)
1
Henry Mountains
1
Henry Mountains (Utah)
1
Navajo Indian Reservation
1
Nevada
1
New Jersey
1
New Mexico
1
Ouray Region
1
Ouray Region (Colo.)
1
Parachute Creek
1
Piceance Creek Watershed
1
Rocky Mountains Region
1
San Luis Valley (Colo. and N.M.)
1
Silverton Region
1
Silverton Region (Colo.)
1
Southwest, New
1