Auto Club Speedway was a 2.000 mi (3.219 km), D-shaped oval superspeedway in unincorporated San Bernardino County, California, near Fontana. It hosted National Association for Stock Car Auto Racing (NASCAR) racing annually from 1997 until 2023. It was also previously used for open wheel racing events. The racetrack is located 47 mi (76 km) east of Los Angeles and is near the former locations of Ontario Motor Speedway and Riverside International Raceway. The track is owned and operated by NASCAR. The speedway is served by the nearby Interstates 10 and 15 freeways as well as a Metrolink station located behind the backstretch.

The Automobile Club of Southern California is the Southern California affiliate of the American Automobile Association (AAA) federation of motor clubs. The Auto Club was founded on December 13, 1900, in Los Angeles as one of the nation's first motor clubs dedicated to improving roads, proposing traffic laws, and improvement of overall driving conditions. Today, it is the single largest member of the AAA federation, with almost 8 million members in its home territory of Southern California, more than 16 million members across all subsidiaries in 21 states, and an annual budget in excess of $2 billion.