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Region
- Columbia River >> Douglas County >> Washington >> United States 2
- Idaho >> United States 2
- Oregon >> United States 2
- Snake River >> Franklin County >> Washington >> United States 2
- Washington >> United States 2
- Deschutes River >> Sherman County >> Oregon >> United States 1
- Lemhi River >> Lemhi County >> Idaho >> United States 1
- Montana >> United States 1
- Nevada >> United States 1
- Umatilla River >> Umatilla County >> Oregon >> United States 1
- Utah >> United States 1
- Willamette River >> Multnomah County >> Oregon >> United States 1
- Wyoming >> United States 1
- Yakima River >> Benton County >> Washington >> United States 1
