12 Hours of Thunderhill
- When
- Where
- Thunderhill Raceway Park, Willows, CA
- Event type
- race
12 Hours of Thunderhill is a full day of endurance racing at Thunderhill Raceway Park in Willows, CA. This event focuses on daylight-only racing, eliminating the need for expensive lighting equipment. The race features five time-bracketed classes designed to reduce costs, along with five minute timed fuel stops for all classes except unlimited. Entrants will compete for special prizes and awards in classes based on lap times: Unlimited, Class A (no faster than 1:54), Class B (no faster than 2:00), Class C (no faster than 2:05), and Class D (no faster than 2:10). The Unlimited class has a maximum lap time of 1:45. A live stream TV show will cover the race.