Pony express data from the NPS website.
CitationsNone
Washington
Idaho
Wyoming
Alberta
Colorado
Oregon
New Mexico
Utah
Nevada
Arizona
South Dakota
Nebraska
Montana
California
Iowa
Missouri
Kansas
Wisconsin
North Dakota
Minnesota
Michigan
Kearney
4
6
3
2
9
2
4
6
3
2
9
2
7
3
5
12
12
26