FONTANA, CA:  The Auto Club Speedway of Southern California (formerly California Speedway) is a two-mile (3 km), low-banked, D-shaped oval superspeedway in Fontana, California, similar to its "sister track" Michigan International Speedway. The Auto Club Speedway is the only track owned by International Speedway Corporation to have naming rights sold.

The track is located on the site of the former Kaiser Steel mill. It is a relatively new race track, opening in early 1997, and has additional configurations and facilities to accommodate road races, motorcycle races, vehicle testing, and drag races (Auto Club Dragway). The racetrack is near the former locations of Ontario Motor Speedway and Riverside International Raceway. After Riverside's closure in 1988, Southern California did not host a NASCAR race until California Speedway was opened. In addition to NASCAR, the raceway has also hosted open-wheel events from both CART and the Indy Racing League.