Continuity mistake: Near the end, Sam Clayton is nearing the finish. The audio leads you to believe that the horse is breathing VERY hard, but when the camera shows the horse, the nostrils are NOT flared as they would be on a horse that has been run to exhaustion (or even down the block). Also, the people filming this scene obviously have no clue about the nature of sweating in horses. They showed "lather" all through the horse's mane. The ONLY places horses will lather while sweating is where something is rubbing, i.e. underneath the saddle, the bridle or breast collar, where the reins rub on the neck or between their back legs.
Continuity mistake: Near the film's end, Kirk Douglas, in custody, is being walked along a street, his hands fastened behind him. He gets jostled by a horse and his arms instinctively come up to fend off the steed, even though his hands are supposedly tied or cuffed behind him.
Continuity mistake: When the fireman falls from the engine passing over the deep gorge we hear him screaming. John Deakin examines the body and later explains that due to the lack of bleeding the man was already dead before he fell. (He theorizes he was killed and then pushed from the engine because he had discovered the 2 bodies of the missing officers in the woodpile).
Continuity mistake: When Molly dismounts her horse near the end of the movie the blanket slides off. A second later the blanket appears back on the horse.