Sun, Oct 18, 2026

Late Apex 4 hour Enduro

Thunderhill Raceway Park

About this event

Late Apex 4 Hour Enduro

Thunderhill Raceway Park

October 18, 2026

Entry Fees:

Enduro CAR Fee: $1250

Min Driver count per car = 1, Maximum Driver count per car = 4

Activities: 1 hr Qualifying Practice - 4 hr enduro - 1 hr Track Day Experience
                                                                           (Workers, Family, and Crew)

 
 

 

To run this event, we must reach 25 registered cars by midnight on September 13th. If we do not hit 25 sign-ups by the deadline, the event will be canceled and you will not be charged.

Once we hit our 25-car minimum to run the event your card will be charged and, all registrations become final and non-refundable.

Schedule:TBD

Track Configuration: 3-mile course

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

Car Classes

ENDURO CLASSES:
ES-R Prototype (ESR):
Eligible Cars: P, P2, NASA Super Unlimited

ES-1 GT Extreme (ES1):
Eligible Cars: GT1, SP, NASA ST1, NASA ST2

ES-2 GT Pro (ES2):
Eligible Cars: GT2, SS, T1, ITE, GT3, GTA, NASA ST3

ES-3 GT Club (ES3):
Eligible Cars: STU, N3, SRF3, GTX, SMG, EP, T2, T3,NASA ST4

ES-4 Touring Pro (ES4):
Eligible Cars: STL, SSC5, FP, GTL, AS, Spec E46, NASA ST5

ES-5 Touring (ES5):
Eligible Cars: Spec E30, SMX, ITS, MC, EM1, ITA, ITR,GT3U, THR, T4, SMT, ITX, SSM, HP, NASA ST6, ITB,ITC, VTA

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

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 MotorsportReg.com 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

The organizations whose licenses are currently approved for competition 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; SCCA , Novice Permits accepted

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 office at 530-934-4455 or email at dottie@sfrscca.org.

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

On the next page:  add or select your vehicle.

Thunderhill Raceway Park

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

Organizer

Endurance Racing organized by

Thunderhill Raceway Park

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Late Apex 4 hour Enduro

Sun, Oct 18, 2026