Sonoma Registration & Information

Sonoma Registration is now open.
After two exciting race weekends in Arizona we are saying goodbye to the Sonoran Desert and hello to California and Sonoma wine country. Registration is open for the closing rounds of the 2024 Challenge of the Americas season at Sonoma Raceway. R5/R6 will take place April 12-14 on the National CW circuit, as we get set to crown the 2024 champions. Enter here –

Pre Entry Deadline:
In order to fit everyone into a very small paddock & the need to have accurate fuel and tire projections for the final weekend, pre-entry will close at midnight 3/31

Event Info:

Westbound State Route 37 Full Highway Closures at State Route 29

Weekends of April 12 and April 19

Weekend closure on Westbound (WB) SR-37 is scheduled on the weekends of April 12 & April 19. WB SR-37 will be closed and traffic detoured beginning at the WB SR-37 Connector Off-ramp to SR-29 in Vallejo. Closures will start Fridays at 9:00 PM and conclude on the following Mondays at 4:00 AM.

Westbound State Route 37 Detour

  • Motorists traveling westbound on SR-37 will need to exit right onto northbound SR-29 (Sonoma Blvd) in Vallejo
  • Continue on NB SR-29 (Broadway) in American Canyon to SR-29/SR-12
  • Turn left and continue on SR-12/SR-121 (Carneros Hwy/Fremont Drive)
  • Turn left on SR-121 (Arnold Drive)
  • Make a right back on WB SR-37.

Practice Sessions:
Here are the links for track ran practice days. Pre paying is mandatory via the track. So if you plan on practicing prior to our Friday official practice make sure to register.

Wednesday –

Thursday –

Main calendar –

Karting calendar –