Region
Oregon National Historic Trail
West (U.S.)
369
United States
289
Oregon
118
West United States
86
California National Historic Trail
60
Oregon Trail
57
United States, West
51
California
33
Oregon Territory
33
Northwest, Pacific
28
Mormon Pioneer National Historic Trail
23
Northwestern States
22
Wyoming
17
Rocky Mountains
15
Pony Express National Historic Trail
13
Idaho
11
Santa Fe National Historic Trail
8
Nebraska
7
Washington (State)
7
Astoria (Or.)
6
New York (State)
6
Pacific Northwest
6
Independence Rock (Wyo.)
5
Scotts Bluff National Monument (Neb.)
5
West (U. S.)
5
Columbia River Valley
4
États-Unis (Ouest)
4
Overland Trails
4
Texas
4
Willamette River Valley
4
America
3
Boston
3
Flagstaff Hill
3
Flagstaff Hill (Or.)
3
Fort Hall (Idaho)
3
Great Plains
3
Guernsey (Wyo.)
3
Massachusetts
3
New York
3
Salt Lake City (Utah)
3
Seattle (Wash.)
3
South Pass
3
Utah
3
Willamette River Valley (Or.)
3
Barlow Road (Or.)
2
Blue Mountains Region
2
Blue Mountains Region (Or. and Wash.)
2
Bozeman Trail
2
California Trail
2
more ...