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Region
- Douglas County >> Oregon >> United States 28
- Horse Heaven Hills >> Benton County >> Washington >> United States 15
- Jackson County >> Oregon >> United States 13
- Ravalli County >> Montana >> United States 12
- Lake County >> Montana >> United States 11
- Yaquina Bay >> Lincoln County >> Oregon >> United States 11
- Lincoln Park >> King County >> Washington >> United States 10
- Warner Peak >> Lake County >> Oregon >> United States 10
- Camp Adair (historical) >> Benton County >> Oregon >> United States 9
- Devils Gardens >> Yakima County >> Washington >> United States 9
- Harney County >> Oregon >> United States 9
- Thurston County >> Washington >> United States 9
- Umatilla Forks Recreation Site >> Umatilla County >> Oregon >> United States 9
- Mima Mounds Natural Area >> Thurston County >> Washington >> United States 8
- North Arm Nuka Bay >> Kenai Peninsula Borough >> Alaska >> United States 8
- Blue Mountains >> Columbia County >> Washington >> United States 7
- Josephine County >> Oregon >> United States 7
- Lewis & Clark Caverns State Park >> Jefferson County >> Montana >> United States 7
- Lincoln County >> Oregon >> United States 7
- Sweeney Peak >> Ravalli County >> Montana >> United States 7