Region
United States
16
Michigan
4
Alaska
3
California
3
Wyoming
3
Yellowstone National Park
3
Grand Teton National Park
2
Hawaii
2
Isle Royale National Park
2
Kilauea Volcano (Hawaii)
2
New Mexico
2
Rocky Mountains
2
Washington (State)
2
West Virginia
2
Apache County
1
Arizona
1
Bryce Canyon National Park
1
California, Northern
1
Colorado
1
Death Valley (Calif. and Nev.)
1
Death Valley National Park (Calif. and Nev.)
1
Denali National Park and Preserve
1
Denali National Park and Preserve (Alaska)
1
Dinosaur National Monument (Colo. and Utah)
1
East (U.S.)
1
Everglades
1
Florida
1
Fort Davis National Historic Site
1
Fort Davis National Historic Site (Tex.)
1
Gauley River National Recreation Area
1
Gauley River National Recreation Area (W. Va.)
1
Great Basin National Park
1
Great Basin National Park (Nev.)
1
Harpers Ferry Region
1
Hawaii Volcanoes National Park (Hawaii)
1
Indiana
1
Indiana Dunes National Lakeshore
1
Indiana Dunes National Park (Ind.)
1
Isle Royale
1
Jewel Cave National Monument (S.D.)
1
Katmai, Mount (Alaska)
1
Kilauea Volcano
1
Lassen Peak
1
Lassen Peak (Calif.)
1
Lassen Volcanic National Park
1
Minnesota
1
Mississippi National River and Recreation Area
1
Mississippi National River and Recreation Area (Minn.)
1
Mount Rainier National Park
1
Mount Rainier National Park (Wash.)
1
more ...