Riders of Black Hills is the second of 13 consecutive "Three Mesquiteers" westerns directed by George Sherman. The Mesquiteers this time out are Stony Brooke (Bob Livingston), Tucson Smith (Ray Corrigan) and Lullaby Joslin (Max Terhune). All three come to the rescue when a racehorse is kidnapped by the mustache-twirling villains. One of the Mesquiteers is accused of being in on the snatch, but his two friends manage to clear his name by fadeout time. The unusally strong supporting cast includes Maude Eburne as the feisty owner of the horse, Roscoe Ates as a stuttering sheriff, and Ben Hall as a lamebrained reporter. Less violent than most Republic westerns of the era, Riders of the Black Hills finds our heroes using fancy rope tricks and horsemanship rather than bullets to rout the bad guys.