Region
California
2
Michigan
2
Wyoming
2
Alaska
1
Big Bend National Park
1
Big Bend National Park (Tex.)
1
Chaco Culture National Historical Park (N.M.)
1
Cherokee County
1
Cleveland County
1
Colorado
1
Colorado National Monument
1
Colorado National Monument (Colo.)
1
Death Valley National Park (Calif. and Nev.)
1
Gaston County
1
Grand Teton National Park
1
Grand Teton National Park (Wyo.)
1
Great Smoky Mountains National Park (N.C. and Tenn.)
1
Harpers Ferry Region
1
Isle Royale
1
Isle Royale National Park
1
Joshua Tree National Park
1
Joshua Tree National Park (Calif.)
1
McKinley County
1
New Mexico
1
North Carolina
1
Portage Lake Volcanics (Mich.)
1
Saint John
1
San Juan County
1
South Carolina
1
Teton Range (Wyo. and Idaho)
1
Texas
1
United States Virgin Islands
1
West Virginia
1
Wrangell-Saint Elias National Park and Preserve
1
Wrangell-Saint Elias National Park and Preserve (Alaska)
1
Yellowstone Lake
1
Yellowstone Lake (Wyo.)
1
York County
1
Yosemite National Park
1
Yosemite National Park (Calif.)
1