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Region
- California >> United States 6
- Columbia River >> Douglas County >> Washington >> United States 6
- Oregon >> United States 6
- San Diego River >> San Diego County >> California >> United States 6
- Washington >> United States 6
- Willamette River >> Multnomah County >> Oregon >> United States 6
- Snake River >> Franklin County >> Washington >> United States 5
- Coos Bay >> Coos County >> Oregon >> United States 3
- San Francisco Bay >> San Mateo County >> California >> United States 2
- Umpqua River >> Douglas County >> Oregon >> United States 2
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License
- Creative Commons: Public Domain Mark 1.0 6