In the scene where Jill has been injured and is being loaded into the ambulance, one of the people standing next to the ambulance door is Dave McCoy himself, who was Jill Kinmont's coach.
When Jill's native school children begin to ride the horses on the Booth property, John drives up in his truck. A man helping the children says to John, "Hi, Joe." John then replies, "Hi, John." Obviously it should be the other way around.
It looks like this film shot exteriors in Bishop however interiors were more likely shot on sound stages. The Bars in Bishop shown in this are either gone or more likely shot somewhere else. The final scene in the highway were most likely shot in the opposite direction in which the filmmakers show. In the film they are allegedly heading to LA however there is not 4 lane highway right outside of Bishop (heading to LA). That part of the film was most lkely shot on the opposite side of town coming into Bishop,