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Region
- Columbia River >> Douglas County >> Washington >> United States 7
- Oregon >> United States 7
- Snake River >> Franklin County >> Washington >> United States 7
- Washington >> United States 7
- Willamette River >> Multnomah County >> Oregon >> United States 7
- Coos Bay >> Coos County >> Oregon >> United States 4
- Yamhill River >> Yamhill County >> Oregon >> United States 2
- Celilo Canal >> Wasco County >> Oregon >> United States 1
- Clearwater River >> Nez Perce County >> Idaho >> United States 1
- Coquille River >> Coos County >> Oregon >> United States 1
- Cowlitz River >> Cowlitz County >> Washington >> United States 1
- Idaho >> United States 1
- Lewis River >> Cowlitz County >> Washington >> United States 1
- Nehalem River >> Tillamook County >> Oregon >> United States 1
- Umpqua River >> Douglas County >> Oregon >> United States 1
- Yakima Valley >> Yakima County >> Washington >> United States 1
- Yaquina Bay >> Lincoln County >> Oregon >> United States 1
