Region
United States
Colorado
2
Montana
2
New Mexico
2
Arizona
1
Cache National Forest (Utah and Idaho)
1
California
1
Cibola County
1
Clark County
1
El Malpais National Conservation Area
1
El Malpais National Conservation Area (N.M.)
1
El Malpais National Monument
1
El Malpais National Monument (N.M.)
1
Guam
1
Hawaii
1
Idaho
1
Los Alamos Region
1
Malheur National Forest
1
Mann Gulch
1
Mendocino National Forest (Calif.)
1
Mount Naomi Wilderness (Utah)
1
Nevada
1
Oregon
1
Riverside County
1
Sierra National Forest
1
Sierra National Forest (Calif.)
1
Southwest, New
1
Uinta National Forest (Utah)
1
Utah
1
Washington (State)
1
Yellowstone National Park
1