Continuity mistake: When Tonto is burying the Rangers he brushes dirt on top of John Reid, but after "Silver" arrives and they show his body again the dirt is gone.
Factual error: When the lone ranger fires his guns at the train he shoots over 20 times, despite using a 6 shooter.
Continuity mistake: At the end of the film when the train crashes off the bridge, the bad guy is dragged down underwater with the freight wagons and drowns. The water is shown to be very deep, but when Tonto looks over the edge we can see the steam locomotive and coaches only half submerged in the river, indicating that it's not that deep.
Factual error: Tonto explains to a boy how he showed two men the location of rich silver deposits in exchange for a cheap watch from Sears Roebuck. The scene is to have taken place when Tonto was child, which would be several years prior to 1876, when Tonto was an adult. However, Sears Robuck was not founded until 1893, many years after the story could have taken place.
Factual error: About 3/4 of the way through, a scene shows two trains facing each other, and a band plays "Stars and Stripes Forever" a famous march composed by John Phillip Sousa. However, this march was not composed until 1896, 20 years after the scene supposedly takes place (1876).
Factual error: The opening scene takes place in 1933 and shows a young boy in a cowboy outfit looking at dioramas in a Wild West exhibit at a carnival. In the background, "Tumbling Tumbleweeds" is playing. That song was written by Bob Nolan in 1934. Nolan and Roy Rogers formed the Sons of the Pioneers that same year and the song became their first hit, in December 1934.