The Premier Bike Park in the U.S. With some of the most radical terrain in the country, 80+ miles of singletrack offering plenty of jumps, berms and drops to feast on, Mammoth is the biggest, baddest and best bike park in the U.S. Our beginner-friendly Discovery Zone is the best place to learn and is specifically designed to make progression easy. The rugged geology of the Eastern Sierra combined with natural and man-made features – like step-ups, wall-rides and pavers – delivers the ultimate high-alpine riding experience.