Region
Afton Canyon Natural Area
1
Afton Canyon Natural Area (Calif.)
1
Alaska
6
Arizona
3
Bonneville Salt Flats
1
California
10
California, Southern
1
Canada
1
Centennial Mountains (Idaho and Mont.)
1
Colorado
3
Colorado Plateau
1
Costa Rica
1
Cumberland Gap National Historical Park
1
El Malpais National Conservation Area
1
El Malpais National Conservation Area (N.M.)
1
Fort Davis National Historic Site
1
Fort Davis National Historic Site (Tex.)
1
Grand Canyon National Park
1
Grand Canyon National Park (Ariz.)
1
Grant-Kohrs Ranch National Historic Site
1
Grant-Kohrs Ranch National Historic Site (Mont.)
1
Great Britain
1
Idaho
2
Kansas
1
Kenai National Wildlife Refuge (Alaska)
1
Kentucky
1
Kings Canyon National Park (Calif.)
1
Kobuk Valley National Park
1
Kobuk Valley National Park (Alaska)
1
Linn County
1
Malheur National Wildlife Refuge
2
Malheur National Wildlife Refuge (Or.)
2
Mexico
1
Mineral King Valley
1
Mississippi River Valley
1
Mississippi River Watershed
1
Montana
4
Nevada
1
New Mexico
2
New River Gorge National Park and Preserve
2
New River Gorge National Park and Preserve (W. Va.)
2
Noatak National Preserve
1
Noatak National Preserve (Alaska)
2
North America
1
Northwestern States
1
Oregon
5
Organ Mountains Wilderness
1
Reserva Biológica Bosque Nuboso Monteverde
1
Rocky Mountain National Park
1
Rocky Mountain National Park (Colo.)
2
more ...