National Auto Sport Association Northern and Southern California crossover weekend at Buttonwillow Raceway Park (Circuit layout) in Buttonwillow, CA. Drivers from both regions compete together, with points counting toward their respective regional championships. The event offers three participation formats:

High Performance Driving Education (HPDE) is the entry point for drivers new to track events. Cars run in groups organized by experience level, with in-car instruction available for newer drivers. The focus is on building skills in a safe, controlled environment — proper lines, braking points, flag awareness, and car control. No competition license required.

Time Trial is for licensed competitors running against the clock in structured sessions throughout the weekend. Drivers compete for fastest lap times within their class. A NASA Competition or Time Trial license is required.
Road Racing is wheel-to-wheel competition in organized race groups. Drivers compete in classes based on car and modifications.

A NASA Competition Racing license and current medical examination are required.

Paddock camping is available Friday and Saturday nights at no charge. All participants must pass a tech inspection before driving. NASA membership is required — annual memberships and event registration are available at members.drivenasa.com.