Region
United States
345
California
37
New Mexico
36
Oregon
28
Utah
27
Colorado
24
Alaska
20
Arizona
19
Washington (State)
18
Idaho
16
Wyoming
16
Nevada
14
Washington (D.C.)
12
Louisiana
10
West (U.S.)
10
Massachusetts
8
Marshall Islands
7
United States Virgin Islands
7
Delaware
6
Mexico, Gulf of
6
Montana
6
Northern Mariana Islands
6
Pennsylvania
6
Puerto Rico
6
Texas
6
Maryland
5
Michigan
5
South Dakota
5
West Virginia
5
Connecticut
4
Florida
4
Georgia
4
Mississippi
4
Missouri
4
Nebraska
4
New Jersey
4
New York (State)
4
Oklahoma
4
Tennessee
4
Virginia
4
Acadia National Park (Me.)
3
Alpine Lakes Wilderness (Wash.)
3
Alta
3
American Falls Reservoir
3
American Samoa
3
Barataria Preserve (La.)
3
Box Elder County
3
C.C. Cragin Dam (Ariz.)
3
C.C. Cragin Reservoir (Ariz.)
3
Caribbean National Forest
3
more ...