2.5 hours Endurance Race - 2025 Labor Day Weekend

8/31 - 9/1 (Sun - Mon) Thunderhill Raceway East 3 miles

Sunday:

Monday (Labor Day):

Price: Before Aug 9th - $350 --> Aug 10th $450

The race format, regulations, and pricing remain identical to those of our previous event. You can find more details on our blog at the following link: Rules / Blog
Feel free to let us know if you have any questions by emailing us at info@speedsf.com

Rules:

Tires: Any tires
No minimum driver requirement
Vehicles must comply with SCCA, NASA, Lucky Dog, PCA, WRL, wheel-to-wheel racing rules

Classification:

Three classes: Group A / B /C
Classes will be determined by Sunday's qualifying time. We will classify your car based on our experience and the vehicle's performance at the current race.
Group A - Fastest (Target lap time: 1:54 - 1:59)
Group B - Mid (Target lap time: 2'00 - 2'05)
Group C - Slowest (Target lap time: 2'06+)

Pit stops:

1 Minimum pit stop required.
Pit stops will only be performed at the hot pit with a 5-minute required pit time. (In and out of the paddock/hot pit)
Refuel must be performed in the hot pit.
Tire change is allowed after refueling.
A timer will be placed on every vehicle during the pit stop.

Race pace:

We will set a delta lap time after the qualifying session. The delta is -1 sec. If your vehicle goes faster than our pre-set lap time by 1 sec of your class, a penalty (Black flag) will be issued.
The first black flag will be a drive-through warning letting you know you have exceeded the time. The second black flag will be a two- (2) minute hold. The third black flag will be a five- (5) minute hold. The fourth black flag will result in a disqualification for that race, and the vehicle will be removed from competition for the rest of the day.