Skip to main content
Speed SF 2.5hrs Endurance Race Registration

Speed SF 2.5hrs Endurance Race Registration

Sat, Jun 6, 2026 – Sun, Jun 7, 2026Sonoma Raceway, Sonoma, CA
Host
Not host-claimed.
This event was sourced from public listings and added by third parties. Please verify details directly with the event host.

About this event

    

 

2.5 hours Endurance Race - Round 2

6/6 - 6/7 (Sat - Sun)  Sonoma Raceway

Saturday:

  • Practice and Qualifying

Sunday:

  • 2.5 hours Race

Early Sign-up price: $400  (Regular price $550)

  • 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 Saturday's qualifying time. We will classify your car based on our experience and the vehicle's performance at the current race. 
  • Group A - Target lap time: 1:43 - 1:47* (Sonoma Raceway)

    • Example: M3, Corvette, Cayman, etc

  • Group B - Target lap time: 1'48 - 1'53*

    • Example: 350z, S2000, Spec E46, Mustang, Boxster, etc

  • Group C - Target lap time: 1'54+*

    • Example: Miata, E30, IS300, 944, E36 325i/328i, etc

  • *Actual Classing will be determined by historical data and the build reports supplied by teams after the qualifying session

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. 

 


 


Requirements:

  • No minimum driver requirement for this race.
  • 18+ years old with a valid US or International driver's license
  • Minor (16+) requires approval.
  • NASA SCCA race licenses are required. Lucky Dog or other racing series are allowed with demonstrated/documented racing experience.
  • My laps / AMB transponder is required. Rental is available.
  • Vehicles must comply with SCCA, NASA, Lucky Dog, PCA, WRL, wheel-to-wheel racing rules

 

Gallery

0 / 20 photos · 0 / 3 videos

No photos yet.

Discussion

0 threads

Event message board to ask questions about the event.

Open discussion