Quick and Dirty MTB
San Diego based, run by Victor Sheldon, the former US National Jet Ski champion. Really fun courses and gets all kinds of talent, such as John Tomac, Jeremy McGrath, Tinker Juarez and other nationally recognized talent
Orange County based race organization ran the most successful mid week mountain bike short track series on Tuesday nights in the US. Usually sell out with 600 entries each race! Course lengths are around 3.5 to 4 miles.
Over the Hump
Mid week race series held at Castaic lake by the saem promoters as Race OC. Short and fast laps and courses for every type of rider!
Races and Chasers
Racers and Chasers have teamed up with the California Enduro Series and called it PCA to put on MTB enduro series!