Continuity mistake: This mistake occurs when Dalton shakes Emmet's hand while outside the horse barn. When they first meet he is working, wearing gloves. After they make intros and shake hands, he is not wearing gloves. In the immediate scene after, he is shown picking up hay and the gloves are back on. (00:20:50)
Revealing mistake: Double Deuce is in Jasper, MO, but this was filmed in California. After Dalton tells Tilghman that Brad Wesley was not afraid, it cuts to Dalton driving. In the background, at the left there's a sign for "Magic Mountain Pkwy" and at the right the California State Route 126 sign that reads "126 West, Ventura." After the Ford dealership is destroyed, another sign in the background reads "Los Angeles, Bakersfield" (the I-5 North to Bakersfield and I-5 South to Los Angeles). (01:25:55)
Continuity mistake: After the fight ends between Dalton and Jimmy, Jimmy is killed and kicked into the water. When Doc pulls Jimmy's body out and onto the sand, his eyes are wide open. Immediately after from a further camera angle, his eyes are closed before Doc attempts to close them.
Visible crew/equipment: When Dalton pulls up to Red's Auto Store just after Jimmy and the other guy get in the red Mustang, you can see the crew in the reflection of the car door as they back out and drive away. (00:44:45)
Continuity mistake: In the last 10 minutes of the movie, Swayze is walking around two dead men in the thugs house. Watch their feet. First, one dead guy's boots are both pointed in the same direction, in the next shot, they are pointing different directions. (01:43:20)
Chosen answer: Legends of the Fall by Jim Harrison.