Butterfield Overland Mail in California
The Butterfield Overland Mail in California was created by the United States Congress on March 3, 1857, and operated until June 30, 1861. Subsequently, other stage lines operated along the Butterfield Overland Mail in route in Alta California until the Southern Pacific Railroad arrived in Yuma, Arizona in 1877.
Source: Wikipedia — Butterfield Overland Mail in California (CC BY-SA 4.0)