Region
Adirondack Mountains (N.Y.)
1
Alaska
1
Arizona
2
California
3
California, Southern
1
Californie
1
Caribou-Targhee National Forest
2
Colorado
2
Concord (Mass.)
1
Durham (N.C.)
2
East (U.S.)
1
Elko
1
Europe
2
Florida
2
Great Smoky Mountains (N.C. and Tenn.)
1
Great Smoky Mountains National Park (N.C. and Tenn.)
1
Hawaii
2
Hawaii Volcanoes National Park
1
Maine
1
Michigan
1
Mojave National Preserve
1
Mojave National Preserve (Calif.)
1
Nevada
1
New England
1
New Mexico
1
North America
1
Ogden
1
Oregon
1
Pike National Forest (Colo.)
1
Sacramento
1
San Isabel National Forest (Colo.)
1
Shenandoah National Park
1
United States
17
Utah
3
Virginia
1
Wales
1
Washington (State)
1
West (U.S.)
1
Yellowstone National Park
2