Dirt Riot Endurance Racing Season Finale Coppermines OHV Park Altus, Oklahoma Classes of vehicles include: UTV – 1 hour race - Entry Fee $100 - Trophy (1st-3rd) Trail Class – Stock Trail and Modified Trail – 1 hour race - Entry Fee $100 - Trophy (1st-3rd) U4 (Unlimited 4x4) – 3 hour race - Entry [...]