Region
United States
438
California
74
Alaska
73
Colorado
72
New Mexico
46
Washington (State)
42
Arizona
40
Florida
38
Utah
33
Montana
30
Wyoming
25
Texas
24
New Jersey
23
Ohio
23
Virginia
23
Massachusetts
21
Idaho
20
Louisiana
20
Grand Teton National Park (Wyo.)
19
Oregon
19
Maryland
16
Michigan
16
New York (State)
16
North Carolina
16
Tennessee
16
Hawaii
15
Nevada
15
Rocky Mountain National Park (Colo.)
15
Missouri
14
South Dakota
14
Cuyahoga Valley National Park (Ohio)
13
Everglades National Park (Fla.)
13
Pennsylvania
13
West Virginia
13
Yellowstone National Park
13
Arkansas
12
Black Canyon of the Gunnison National Park (Colo.)
12
Georgia
11
Glacier National Park (Mont.)
11
Grand Teton National Park
11
West (U.S.)
11
Gateway National Recreation Area (N.J. and N.Y.)
10
Golden Gate National Recreation Area (Calif.)
10
Minnesota
10
Olympic National Park (Wash.)
10
Yosemite National Park (Calif.)
10
Curecanti National Recreation Area (Colo.)
9
Glacier Bay National Park and Preserve (Alaska)
9
Mississippi
9
Ohio and Erie Canal National Heritage Corridor (Ohio)
9
more ...