An American Western; A story about an undercover government agent who goes to jail in order to find out who's behind a hold up of a highway development in a mining town.
John Wayne is callow and gauche in his delivery but he produces some dashing form, and "Gabby" Hayes is humorous as the "old timer" aiding his efforts. But, this is a very generic adventure with an uneven storyline, poor dialogue and clumsy direction. The stuntwork is the better aspect of the film.
Review of Rainbow Valley
