Region
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Beltrami County
1
Bentley Region
1
Berkshire Hills Region
1
Big Bend National Park
1
Big Darby Creek Watershed
1
Big Hole River
1
Big Lost River Watershed
1
Big Sioux River (S.D. and Iowa)
2
Big Sioux River Valley (S.D. and Iowa)
2
Big Thompson River Watershed
1
Bighorn River (Wyo. and Mont.)
1
Birch Creek (Yukon-Koyukuk Census Area, Alaska : River)
1
Birch Creek Watershed (Yukon-Koyukuk Census Area)
1
Biscayne National Park
1
Bitterroot River
1
Black Gore Creek
1
Black Hills (S.D. and Wyo.)
5
Black Mesa (Navajo County and Apache County)
1
Black Rock Desert-High Rock Canyon Emigrant Trails National Conservation Area
1
Blackfoot River
1
Blackfoot River Watershed
1
Blacks Fork (Utah and Wyo.)
1
Blackstone River (Mass. and R.I.)
1
Boise River Watershed
1
Boulder Creek Watershed (Boulder County and Weld County)
1
Bradley River
2
Brazos River
2
Brazos River Watershed
4
Brazos River Watershed (Tex.)
2
Broward County
1
Buffalo River
1
Cache Creek
1
Cache Creek (Lake County and Yolo County)
1
Cache la Poudre River Watershed
1
Caddo Nation of Oklahoma
1
California
26
Calumet Region (Ill. and Ind.)
1
Canada
3
Canadian River
2
Cannon River
1
Cannon River (Minn.)
1
Canyonlands National Park
1
Cape Cod National Seashore
1
Cape Cod National Seashore (Mass.)
1
Cape Fear River Valley
1
Cape Fear River Watershed
2
Catskill Mountains
1
Catskill Mountains Region
1
Cedar River (King County)
1
Cedar River (Minn. and Iowa)
1
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