Sierra Passage was the first of a brief series of program westerns produced by Monogram and starring Wayne Morris. The film casts Morris as Johnny Yorke, the sharpshooting star of a travelling show run by Sam (Roland Winters) and Thad (Lloyd Corrigan). Johnny hopes someday to run across the man (or men) responsible for the murders of his parents. Meanwhile, he romances the travelling troupe's songstress Ann (Lola Albright). Billy Gray, who later played Bud in TV's Father Knows Best, shows up as the younger Johnny Yorke. The ironic ending of Sierra Passage is but one of the film's many unexpected highlights.