Region
West (U.S.)
United States
105
California
36
Rocky Mountains
33
Colorado
30
Oregon National Historic Trail
17
New Mexico
14
Pacific States
14
Utah
14
Southwest, New
12
Mississippi River Valley
11
Santa Fe National Historic Trail
11
Mexico
10
Northwestern States
10
Yellowstone National Park
10
Missouri River
9
Oregon
9
Colorado River (Colo.-Mexico)
8
Columbia River
8
Texas
8
Wyoming
8
Arizona
5
Grand Canyon (Ariz.)
5
Mississippi River
5
Missouri River Valley
5
Nevada
5
Northwest, Canadian
5
Northwest, Pacific
5
Pikes Peak (Colo.)
5
Rocky Mountains Region
5
California National Historic Trail
4
Chisholm Trail
4
Denver (Colo.)
4
Great Plains
4
Great Salt Lake (Utah)
4
Kansas
4
Missouri
4
Northwest, Old
4
Bent's Fort (Colo.)
3
Hawaii
3
Idaho
3
Nebraska
3
Oklahoma
3
Oregon Territory
3
America
2
Astoria (Or.)
2
British Columbia
2
Chihuahua (Mexico : State)
2
Colorado Plateau
2
Colorado River Valley (Colo.-Mexico)
2
more ...