Revealing mistake: At the cave near the end, there are several scenes with the secretary of the interior. These scenes with the main actors appear to be filmed in front of the background as they cast shadows on the other film and the lighting is different. This was most likely done because of budget limitations.
Cheyenne Autumn (1964)
1 revealing mistake
Directed by: John Ford
Starring: Richard Widmark, Karl Malden, Carroll Baker, Sal Mineo
Factual error: Monument Valley is certainly not one mile outside of Dodge City Kansas as it appears to be in this film. In fact there are no mountains that tall anywhere near Dodge City Kansas, but they appear in this film.
Wyatt Earp: Say, you're the doctor around here. How come I always have to perform all the complicated operations?
Doc Holliday: You know I am a dentist, not a doctor. Wait until somebody shoot him in the teeth.