Event Overview

Speed SF 2.5-Hour Endurance Race is an endurance racing event presented by Speedsf.com at Sonoma Raceway. The scheduled date is 2026-09-12 through 2026-09-13.

Schedule and Format

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

Entry Fees and Registration

• Early Sign-up price: $400 (Regular price $550)
• Feel free to let us know if you have any questions by emailing us at info@speedsf.com.

Driver and Vehicle Requirements

• Tires: Any tires.
• No minimum driver requirement.
• 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.
• 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)
• Tire change is allowed after refueling.
• Event requirements.
• Requirements:
• No minimum driver requirement for this race.
• 18+ years old with a valid US or International driver’s license.
• 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.

Venue

29355 Arnold Drive, Sonoma, CA 95476

Official Event Information

View the organizer’s official event information.