Region
Colorado
26
South Platte River Valley (Colo. and Neb.)
11
United States
6
South Platte River Watershed (Colo. and Neb.)
3
West (U.S.)
2
Cache la Poudre River Watershed
1
Colorado River (Colo.-Mexico)
1
Colorado River Watershed (Colo.-Mexico)
1
South Platte River (Colo. and Neb.)
1
White River Watershed (Colo. and Utah)
1
Yampa River Valley
1
Yampa River Watershed
1