Region
United States
44
Alaska
21
California
14
Wyoming
13
Colorado
12
New Jersey
12
Utah
12
Grand Teton National Park (Wyo.)
11
New York (State)
11
Texas
11
Arizona
10
Grand Teton National Park
9
Maryland
9
Florida
8
Gateway National Recreation Area (N.J. and N.Y.)
8
Virginia
8
Montana
7
North Carolina
7
Pennsylvania
7
Indiana
6
New York
6
Washington (State)
6
Big Cypress National Preserve (Fla.)
5
Glacier National Park (Mont.)
5
Indiana Dunes National Park (Ind.)
5
Louisiana
5
Massachusetts
5
New Mexico
5
South Dakota
5
Zion National Park (Utah)
5
Cape Cod National Seashore (Mass.)
4
Cape Lookout National Seashore (N.C.)
4
Chamizal National Memorial (El Paso, Tex.)
4
Delaware Water Gap National Recreation Area (N.J. and Pa.)
4
Michigan
4
Middle Delaware National Scenic and Recreational River (N.J. and Pa.)
4
New River Gorge National Park and Preserve (W. Va.)
4
Oregon
4
Washington (D.C.)
4
West Virginia
4
Yellowstone National Park
4
Antietam National Battlefield
3
Antietam National Battlefield (Md.)
3
Apostle Islands National Lakeshore (Wis.)
3
Blue Ridge Parkway (N.C. and Va.)
3
Curecanti National Recreation Area
3
Curecanti National Recreation Area (Colo.)
3
East (U.S.)
3
Fort Davis National Historic Site (Tex.)
3
Minnesota
3
more ...