Region
California
56
Nevada
17
Arizona
16
Utah
16
Alaska
13
Colorado
13
Idaho
13
New Mexico
10
Montana
9
North America
9
United States
8
West (U.S.)
8
Oregon
7
Washington (State)
6
San Joaquin Valley
5
Antarctica
4
Delmarva Peninsula
4
Islands of the Pacific
4
Monterey County
4
Northwest, Pacific
4
Texas
4
Coast Ranges
3
Massachusetts
3
Mojave Desert
3
Oceania
3
Rocky Mountains
3
Sacramento Valley
3
Sangre de Cristo Mountains (Colo. and N.M.)
3
Santa Maria Basin
3
Sierra Nevada (Calif. and Nev.)
3
South Carolina
3
Wet Mountain Valley
3
Wyoming
3
Arctic regions
2
Atlantic Coast (U.S.)
2
Barstow Region
2
Blackfoot Region
2
Bonneville, Lake
2
California, Southern
2
China
2
Churchill County
2
Coast Range
2
Colorado Plateau
2
Colorado River Region (Colo.-Mexico)
2
Death Valley Region (Calif. and Nev.)
2
Feather River Region
2
Fisher Valley
2
Flagstaff Region
2
Fox Mountain (Nye County)
2
Fresno County
2
more ...