The route of the Overland Mail Company, popularly known as the Butterfield Trail due to the name of the company’s president, John Butterfield, who headed the operation from 1858 to 1861, when the outbreak of the Civil War forced the company to cease operations.
This map of the Butterfield Overland Mail Route was compiled from a variety of sources including 19th century maps, visual inspection of modern aerial images and descriptions of the route in numerous books. Parts of it have also been field-checked, but parts of it are surely not on the original route.
The National Park Service used this digital map as a baseline dataset when it began a survey to determine the actual route of the Overland Mail for consideration and nomination as a national trail.
After an extensive study of the trail, its place in American history and existing and potential heritage resources along it, the National Park Service recommended designation in 2018. Under leadership of U.S. Sen. John Boozman of Arkansas, the U.S. Senate approved designation as a national historical trail on Dec. 21, 2022.
Word, Image and Sound 
In this map you left out Johnson’s Station, between Grape Creek and Head of the Concho and on the butterfieldoverlandmail.com you have it incorrectly listed as Camp Johnston. I did the archeological research and excavation of Johnson’s Station and can send you a full report.
Thanks Thomas, I would be glad to update the map with the location of Johnston’s Station. You can send details to me at charlie.alison@gmail.com. And thanks for the research and excavation that you did on Johnson’s Station.