Tour De Dirt is a chip-timed cross-country mountain bike race series across Oklahoma, organized by racers for racers. Based in Norman, it provides divisions for every age and skill level, accommodating experienced riders, newer racers, juniors, and families seeking organized off-road racing.
The series focuses on Oklahoma trails and the individuals who ride and maintain them. It functions as a 501(c)(3) nonprofit, reinvesting in local cycling, riders, and communities statewide. Its Kids Kup program offers riders 12 and under a dedicated path into racing, and the required season plate incorporates the timing chip used at all events. Tour De Dirt also holds a unique distinction: it is the longest-running mountain bike series in the U.S.