The City of San Dimas has welcomed racers into their town for one of the hardest criteriums in Southern California. The Grand Prix course starts on the streets of historic Old Town San Dimas with its western themes before a right turn into the downtown neighborhood. The course careens racers through six corners and three long three long straight-aways. The long slightly downhill section enables incredible speeds into the righthand corner and onto the finish straightaway. Racers and spectators alike will enjoy one of the highest speed races in Southern California.