Ten members of the Reno gang were lynched in three separate incidents in 1868. The first three were taken by vigilantes from a train. Three others were lynched at a later time. The last lynching--which included Reno brothers, Frank, Sim and Bill--actually claimed a fourth victim, gang member Charlie Anderson. Anderson and Frank Reno were technically in federal custody when they were lynched. This is believed to be the only time in US history that a federal prisoner had ever been lynched by a mob before a trial.
The part of the honest Reno brother Clint was played by Denver Pyle. One year later Elvis Presley made his film debut playing the same character in Love Me Tender (1956).
Most of the town shots are taken in Columbia State Park. The sheriff's office is the Columbia Wells Fargo building.
The Reno Brothers' final robbery was of the Ohio & Mississippi Railroad (1854-91) and is historically correct.
Train being robbed both times is Sierra Railway #3 out of Jamestown, CA.