Region
Arizona
Southwest, New
49
California
12
Colorado River (Colo.-Mexico)
9
United States
9
New Mexico
8
Mexico
4
Sonora (Mexico : State)
3
Beale Road
2
Chevelon Canyon
2
Chevelon Canyon (Ariz.)
2
Colorado
2
Mexican-American Border Region
2
Nevada
2
Phoenix
2
Phoenix (Ariz.)
2
Utah
2
Arizone
1
Awatovi
1
Awatovi (Ariz.)
1
Black Mesa (Navajo County and Apache County)
1
Black Mesa (Navajo County and Apache County, Ariz.)
1
C.C. Cragin Dam (Ariz.)
1
C.C. Cragin Reservoir (Ariz.)
1
Chaco Canyon
1
Chaco Canyon (N.M.)
1
Great Basin
1
Hogup Cave (Utah)
1
Hopi Indian Reservation
1
Las Vegas (Nev.)
1
Navajo Indian Reservation
1
San Jose
1
San Jose (Calif.)
1
Sonora (State)
1
Texas
1
Tombstone
1
Tonto Basin
1
Tonto Basin (Ariz.)
1
Tucson
1
Tucson (Ariz.)
1
Tucson Region
1
Ventana Cave (Ariz.)
1