Region
Arizona
306
New Mexico
17
Sonora (Mexico : State)
13
Nevada
9
California
8
Utah
6
Pinal County (Ariz.)
5
United States
5
Mohave County
4
Pima County (Ariz.)
4
Santa Rita Mountains
4
California Desert National Conservation Area (Calif.)
3
Cochise County
3
Colorado River (Colo.-Mexico)
3
Gila County
3
Southwest, New
3
West (U.S.)
3
Yavapai County
3
Cochise County (Ariz.)
2
Coconino County
2
Colorado
2
Mexico
2
Baboquivari Mountains
1
Baja California (Mexico : State)
1
Bradshaw Mountains
1
Canelo Hills
1
Chiricahua Wilderness Area
1
Christmas Quadrangle
1
Clarkdale Quadrangle
1
Colorado River Valley (Colo.-Mexico)
1
Comobabi Mountains
1
Corduroy Creek Watershed
1
Fort Apache Indian Reservation
1
Four Corners Region
1
Gila River (N.M. and Ariz.)
1
Gila River Watershed (N.M. and Ariz.)
1
Globe-Miami District
1
Graham County
1
Grand Canyon Region
1
Hawaii
1
Imperial County
1
Islands of the Pacific
1
Lake Mead National Recreation Area (Ariz. and Nev.)
1
Maricopa County
1
Mead, Lake, Region (Ariz. and Nev.)
1
Monument Valley Region (Ariz. and Utah)
1
Mule Mountains (Ariz.)
1
Navajo County
1
Needles Region
1
North America
1
more ...