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Region
- Afghanistan 3
- California >> United States 13
- Chehalis River >> Grays Harbor County >> Washington >> United States 1
- Clearwater River >> Nez Perce County >> Idaho >> United States 6
- Columbia River >> Douglas County >> Washington >> United States 36
- Coos Bay >> Coos County >> Oregon >> United States 13
- Coquille River >> Coos County >> Oregon >> United States 2
- Cowlitz River >> Cowlitz County >> Washington >> United States 4
- Crater Lake >> Klamath County >> Oregon >> United States 1
- Crystal Creek >> Klamath County >> Oregon >> United States 1
- Deschutes River >> Sherman County >> Oregon >> United States 1
- Egypt 12
- Ethiopia 2
- Feather River >> Sutter >> California >> United States 1
- Idaho >> United States 9
- Iran 3
- Iraq 12
- Israel 19
- Jordan 18
- Kennebec River >> Sagadahoc County >> Maine >> United States 1