Harley night at Costa Mesa Speedway (www.costamesaspeedway.net). Sidecar races, and harley race. 40 Years of racing, Costa Mesa Speedway, the smallest track in America. Costa Mesa Speedway is the smallest dirt oval track in the US at 500 feet these 500cc NO BRAKE bikes run races of 4 laps each. If a guy goes down during a race, he starts back 20yards on the restart. The sidecars are 1000cc. Dirt and alcohol fuel are the name of the game.