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Region
- Umpqua River >> Douglas County >> Oregon >> United States 20
- Willamette River >> Multnomah County >> Oregon >> United States 14
- Snake River >> Franklin County >> Washington >> United States 12
- Cowlitz River >> Cowlitz County >> Washington >> United States 10
- Astoria >> Clatsop County >> Oregon >> United States 9
- Chehalis River >> Grays Harbor County >> Washington >> United States 9
- Columbia City >> Columbia County >> Oregon >> United States 9
- Columbia River >> Clatsop County >> Oregon >> United States 9
- Nehalem Bay >> Tillamook County >> Oregon >> United States 9
- Nooksack River >> Whatcom County >> Washington >> United States 9
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Institution
- University of Oregon 20