Sat, Mar 18 - Sun, Mar 19, 2023

SFR Championship Regional 3 & 4

Thunderhill Raceway Park

About this event



SCCA San Francisco Region

Championship Series Regionals 3 & 4

Thunderhill Raceway Park

March 18 & 19

Entry Fees:

Double Race $515

Single Race $375

Dual (extra class, same driver, all, or part of weekend)  $225

Schedule: Regional 3-4 March 18-19-2023 Thunderhill schedule UPDAT 3-13-23(c).pdf

Track Configuration: 3-mile course

Test Day: Hosted by Thunderhill Raceway Park. Please call Schuyler for more information at 530-934-5588

Test Day March 17, 2023: Thunderhill Test Day Link

Enter by Friday March 10, 2023 to retain your permanent number.

Online entry closes Thursday March 16, 2023; after that you will need to enter at the track and pay the $50 post entry fee.

CAR NUMBERS are confirmed Friday afternoon the week before the race. 

Enter Now, Pay Later!  SFR will charge your credit card AFTER the race weekend. When you register for a race, you enter your credit card information; after the race weekend, we actually process the card. Now there’s no money barrier to entering early, ensuring you retain your all-important permanent number!

If you have questions about the race weekend, please contact the SF Region Office: 530-934-4455 or

Five Groups: 

Group 1/2/4 …….... EM1, EM2, FA, FA2, FA3, FM, FX, FS, F4, ASR*, FE2, P1, P2, S2*,  CF*, FC, FF, FFT*, FST, FV, F6

GROUP 3 ............ AS, E46, EP, ITE*, GT1, GT2, GT3, GTX*, MC*, SMX, SP*, T1, T2, T3

GROUP 5 ............ B-Spec, FP, GTL, HP, ITA*, ITB*, ITC*, ITR*, ITS*, ITX*, SMG*, SSC5*, STL, STU, T4, T5

GROUP 6 ............ SRF*, SRF3, SRFH

GROUP 7 ............ SM, SMT*, SSM*

If you do not already have a MotorsportReg account, please follow the steps below to create your account this first time. Next time you enter, just log into your account and future entries for SFR events will be quick and painless!

  1. If you do not already have one, create an account on after reading these steps.
  2. Once logged in, click "My Account" in the top right
  3. Review your vehicle(s), making sure to enter your permanent/preferred numbers and your transponder number
  4. Enter your medical information for the Ambulance/Life Support crew.
  5. Now come back to this page and enter the event and pay online.

Event requirements

To enter any SFR road racing event, you must have a valid competition license.

In addition to SCCA licenses, the organizations whose licenses are currently approved by SCCA for competition in Regional events are as follows: BMW CCA Club Racing Full Competition; FIA Issued by any sanctioning body; Historic Sportscar Racing (HSR) HSR License; ICSCC; IMSA; NASA Full Competition; Porsche Club of America Full Competition; SCCA Pro Racing; SVRA; VARA; VMC.

All vehicles must meet the safety requirements detailed in the current SCCA General Competition Regulations. Transponder numbers are required for ALL CARS. If you do not have a transponder listed in your vehicle profile, you MUST rent one.

You will receive an email confirmation/receipt of your entry.  If you have any questions about the event, you can call the SCCA office at 530-934-4455 or email at

If you have technical issues with online entry for the event on, you can contact MSR customer support during normal business hours at 415.462.5603 or by email here.

All drivers must still go through on-site registration with logbooks and licenses at the track.

On the next page:  add or select your vehicle.

Entries (84)

Tom Brown
Nolan Stinger
John Sollner
Tim Wright
Michael Fine
Tom Hummel
Mark Means
Mauro Pellegrini

Thunderhill Raceway Park

Willows, CA
Download track map
Download track map
Buy track decal
Buy track decal
Buy virtual track walk
Buy virtual track walk


Club Race organized by

SCCA - San Francisco Region - Club Racing

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Event over!