Get ready for high-speed thrills at Mammoth Motocross, returning June 20-29, 2025. As the oldest continuously running motocross event in the U.S., this iconic race draws top talent and rising stars. Riders battle it out for the legendary Mammoth bear trophy after earning their place through California qualifiers. From pro legends to tomorrow’s factory stars, this high-altitude track has launched careers and delivered nonstop action since 1968. Don’t miss the energy, history, and adrenaline.