Region
Columbia River
2
Idaho
2
Malheur County
2
Oregon
2
Owyhee County
2
Snake River Plain (Idaho and Or.)
2
Washington (State)
2
Benton Lake National Wildlife Refuge (Mont.)
1
Freezout Lake Wildlife Management Area (Mont.)
1
Humboldt River Watershed
1
Montana
1
Nevada
1
New Mexico
1
San Juan County
1
San Juan River (Colo.-Utah)
1