Which 1924 John Ford silent western was filmed partly in the Sierra Nevada?

The Iron Horse is the 1924 John Ford silent western filmed partly in the Sierra Nevada region.

The film dramatizes the construction of the first transcontinental railroad, following the rivalry, romance, labor, and violence surrounding the rail line’s westward expansion. George O’Brien stars as Davy Brandon, with Madge Bellamy as Miriam Marsh. Ford directed the picture for Fox Film after the success of Paramount’s The Covered Wagon (1923), giving him one of his first genuinely major production budgets.

Location filming took the company to Nevada and California, including the Wadsworth area and rugged mountain locations associated with the Sierra Nevada. The winter shoot became legendary for freezing conditions, improvised housing, and the logistical challenge of moving a large cast and crew by rail.

The Iron Horse was a major commercial success and helped establish Ford as an important filmmaker. It was selected for preservation in the National Film Registry in 2011. The other options are also Ford westerns, but none matches this 1924 railroad epic and its large-scale location production.