Region
Idaho
9
Washington (State)
6
Alaska
5
United States
5
American Falls Reservoir
3
Hawaii
3
Illinois
3
Little Wood River
3
Utah
3
West Virginia
3
Arkansas
2
Kentucky
2
New York (State)
2
Oregon
2
Pennsylvania
2
Wyoming
2
Alabama
1
Arrowrock Dam
1
California
1
Denali National Park and Preserve (Alaska)
1
Great Smoky Mountains National Park (N.C. and Tenn.)
1
Iowa
1
Kantishna Hills
1
Mount Hope
1
New Jersey
1
New Mexico
1
North Carolina
1
Ohio
1
Prince of Wales Island
1
Sequoia National Park (Calif.)
1
Tennessee
1