Region
West (U.S.)
United States, West
15
West United States
8
United States
7
California
4
Alaska
2
California National Historic Trail
2
Golden Spike National Historical Park (Utah)
2
Louisiana
2
Mormon Pioneer National Historic Trail
2
New Mexico
2
Oregon National Historic Trail
2
Pony Express National Historic Trail
2
Utah
2
Casper
1
United States Highway 66
1
Wyoming
1