Region
Arizona
New Mexico
8
Nevada
4
California
3
Utah
3
Colorado
2
Fort Valley Experimental Forest (Ariz.)
2
Grand Canyon
2
Grand Canyon National Park
2
Grand Canyon National Park (Ariz.)
2
Grand Canyon Region
2
Apache County
1
Black Mesa (Navajo County and Apache County, Ariz.)
1
Black Mesa Region (Navajo County and Apache County)
1
Casa Grande Region
1
Catron County
1
Cochise County
1
Colorado Plateau
1
Colorado River Region (Colo.-Mexico)
1
Colorado River Watershed (Colo.-Mexico)
1
El Malpais National Monument
1
Four Corners Region
1
Glen Canyon Dam (Ariz.)
1
Glen Canyon Dam Region
1
Grand Canyon (Ariz.)
1
Grand Canyon Region (Ariz.)
1
Interstate 40
1
McCartys
1
Meteor Crater (Ariz.)
1
Mogollon Rim Region
1
Monument Valley (Ariz. and Utah)
1
Monument Valley Region (Ariz. and Utah)
1
Navajo Indian Reservation
1
Petrified Forest National Park
1
San Juan County
1
San Mateo
1
Santa Rita Experimental Range
1
Santa Rita Experimental Range (Ariz.)
1
Southwestern States
1
Sunset Crater
1
Taylor, Mount
1
United States
1
United States Highway 66
1
Winslow (Ariz.)
1