Race with the Devil

Frank (Warren Oates) and Roger (Peter Fonda) take off for Colorado with their wives in a recreational vehicle, looking forward to some skiing and dirt biking. While camping en route, they witness a satanic ritual sacrifice, but the local sheriff finds no evidence to support their claims and urges them to continue on their vacation. On the way, however, they find themselves fleeing repeated attacks from cult members. (official distributor synopsis)