 Outdoor locations were filmed in Durango, in northern Mexico, and the opening credits scene as a locomotive travels a narrow stream canyon valley on the famed Denver and Rio Grande Western Railroad (now a scenic tourist train) Colorado, United States.The train depot scene that follows that (where the brothers wait for no-show John Wayne) was filmed at Perkinsville Arizona, and that same train depot was used as Gold City near the end of How the West was Won.That train depot still stands at the end of the ride for Verde Canyon Railroad, a tourist train originating in Clarkdale, Arizona, before the train reverses and heads back.