- States: AZ, AR, CA, NM, OK, MO, TN, TX
- NPCA Region: Midwest
- Est. Date: 2023
The Butterfield Overland National Historic Trail follows the first transcontinental mail route that ran through several states from 1858 to 1861. Though the route was abruptly canceled at the start of the American Civil War, it played a vital role in connecting the eastern United States with the rapidly expanding West.
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