The Big Trail is a 1930 American epic pre-Code Western early widescreen film shot on location across the American West starring 23-year-old John Wayne in his first leading role and directed by Raoul Walsh. It is the final completed film to feature Tyrone Power Sr. before his death in 1931, as well as his only sound role.

In 2006, the United States Library of Congress deemed this film "culturally, historically, or aesthetically significant", and selected it for preservation in the National Film Registry, saying "the plot of a trek along the Oregon Trail is aided immensely by the majestic sweep provided by the experimental 70mm Grandeur wide-screen process used in filming".