SFR Championship Regional 3 & 4 info on Mar 18, 2023 (770209) |

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SFR Championship Regional 3 & 4

SFR Championship Regional 3 & 4

SCCA - San Francisco Region - Club Racing

Saturday, Mar 18 — Sunday, Mar 19, 2023
Thunderhill Raceway Park, Willows, CA

Registration closed March 16, 2023 9:00 AM at 2023-03-16T09:00:00-0700 Registration ends March 16, 2023 9:00 AM at 2023-03-16T09:00:00-0700 Registration opens December 13, 2022 12:00 PM at 2022-12-13T12:00:00-0800 Registration runs from December 13, 2022 12:00 PM to March 16, 2023 9:00 AM



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.