2023 Tire Rack SCCA Time Trials National Tour at Thunderhill Raceway Park Powered by Hagerty

April 14, 2023 - 02:00 PM PDT to April 16, 2023 - 05:00 PM PDT
2023 Tire Rack SCCA Time Trials National Tour at Thunderhill Raceway Park Powered by Hagerty

The Tire Rack SCCA Time Trials National Tour invites you to come experience the fun and excitement of competing on track with likeminded enthusiasts. From beginner to seasoned track veterans, these events are a home for anyone that considers themselves a driving enthusiast. And when the track goes quiet, the good times continue with the off-track social activities featuring food, fun, and friends! Camping at the track is encouraged, friends and family are welcome, and food and drink are available on site. Come join in on the good times!




Calling all California time attack and track day enthusiasts! We invite you to join us for an action-packed event hosted by the SCCA at Thunderhill's West Course. The Time Trials National Tour at Thunderhill Raceway is open to all car types, and is designed to provide an awesome experience for everyone, whether you are looking to set new lap records, or to simply get on track to have a blast in your car!  The weekend will consist of:

  • Time Attack – Two days of Time Attack competition with multiple sessions to get your fastest time! Beyond the standard class awards, we will have trophies for: Quickest Overall Lap, Quickest S2K, Quickest FWD, and more!
  • Track Day – Run an HPDE style Track Event on Saturday! You get 3 Twenty minute sessions on track following the Time Trials event.
  • A Time Attack AND Track Day! Want the ultimate amount of seat time? You can sign up for the Time Attack & Track Day to maximize your on-track opportunities!
  • Party in the Paddock! SCCA Time Trials National Tour is known for Saturday evening Hagerty Party.  We’ll have the food and beverages covered, so all you need to bring is your best bench racing game!

Sign up now and get ready for an unforgettable experience at SCCA's "Tuner Battle" weekend at Thunderhill!  Cap is set at 75 for the Time Trial, so sign up early!

Thinking about signing up for the Track Night event and the Time Trials event together? Email Jack@tracknightinamerica.com to tap into some serious double dipper discounts!

Driver Entry Fee: $325.00

* If you don't have your own AMB or Westhold compatible transponder, you will need to add a rental transponder.


Saturday Non-competition Track day with TNiA: $160



Those who want to experience the action, excitement and festivities of a Time Trials National Tour are not limited to drivers. Tech Officials, Timing and Scoring gurus and more are welcome at the event and at the parties. Helping as a volunteer, worker or officials costs nothing and those interested can apply by using the link below.

Official/Volunteer Application:



Event Lead TBA
Competition Director TBA
Driver Coaches TBA

A. GENERAL RULES: This event is governed by the 2023 SCCA Time Trial Rules (TTR), National Competition Format and National Classing as outlined at timetrials.scca.com plus the rules and procedures found on this page.

B. PASSING & TRACK PROCEDURES: Groups will use the suggested passing rules and procedures for Novice, Intermediate and Advanced Drivers as outlined in the “Rules of The Track” section found at timetrials.scca.com.

C. CLOTHING: Drivers are required to wear the minimum clothing outlined in the SCCA Time Trials Rules or as required in the specific track rules for their car and class. Safe apparel must be worn in the pits at all times (shirts and closed toe shoes). Crew members on pit lane must display their event credentials at all times while on pit lane.

D. PACED LAPS: Paced Laps are intended for Novice Drivers and Drivers who have never seen the track. Other drivers may join with permission of their group's driver coach if they join at the back and track density permits.

E. PIT LANE: The speed limit on pit road is 25 mph. No tire scrubbing in the pit lane prior to entering the course.

F. IMPOUND: Drivers will report to impound for post-session debriefs immediately following each session.

G. RESULTS: Live timing will be available during the event at timetrials.scca.com. Provisional and final results will be posted at the Event Center. Additionally, final results will be posted to timetrials.scca.com no later than seven days following the completion of the event.

H. FLAG PROCEDURES: Black Flag Station and other event-specific flagging procedures will be announced at the event.

I. SCALES: Location and Requirements will be available at check-in.

J. EVENT SCHEDULE: Actual session start times may be delayed from the published schedule due to unforeseen circumstances during the event. It is the driver’s responsibility to listen to the PA system and pay attention to activity on track. The schedule or run groups may only be changed (or start times advanced) at the discretion of the Competition Director, with concurrence by the Event Lead, depending on pre-race entry counts or as needed to accommodate situations during the event.

K. COMMUNICATIONS: Radio frequencies used by event officials may be monitored but shall not be used for communication by any participant.

A. DRIVER ELIGIBILITY: The event is open to all drivers with a valid state driver's license and a full membership to the SCCA.  If you don't have a membership you can join when you register.

B. TIME TRIALS LICENSES: It will help if you have one, but it's OK if you don't. Event officials will work with you to make sure you get one fitting your experience level at the event. (No charge.)

C. MEDICAL: Please notify the Officials of any pertinent medical condition(s). Any participants involved in an accident in which there is significant damage or any injury, or at a race official’s discretion, MUST present themselves or be transported to the track medical facility for evaluation. Off-site medical transportation fees may apply.

D. MINOR DRIVERS: Drivers 16- and 17-years-old, with a state-issued driver's license can compete, but there is some extra paperwork. Please contact Officials before the event and get approval from the Event Lead.

A. VEHICLE ELIGIBILITY: Competition is open to all vehicles conforming to the National Time Trials Classes. Some tracks do not allow Electric Vehicles. Please refer to Track Information to verify EV eligibility.

B. DECALS: All cars must have Tire Rack SCCA Time Trials National Tour decals and any required partner decals visibly placed on each side of the vehicle and a Tire Rack windshield banner at the top of the front windshield. Decals will be provided free of charge and may be obtained at registration and/or tech. A diagram of sticker placement for Time Trials National Tour events can be found here: Time Trials National Tour Decal Placement. A diagram of sticker placement for Time Trials Nationals will be available soon.

C. TECHNICAL INSPECTION: All vehicles must be presented at tech to turn in tech forms and pass the event safety inspection (Tech) if required prior to any on-course participation. Tech may also check event sponsor decal requirements and verify compliance of Vehicle Identification. Competitors are cautioned that vehicle/identification color combinations such as red/black, red/blue, and white/silver do not have adequate contrast.

D. TIMING & SCORING: All cars are required to use fully operational Westhold, MyLaps/AMB TranX260 or X2 transponders. The driver is responsible for providing correct information to Timing & Scoring. Non-functioning transponders will likely result in the loss of times.

E. RENTAL TRANSPONDERS: Rental transponders are available through registration.

General Info

  1. Thunderhill has a DB limit of 103 for all vehicles and mufflers are required.
  2. Entrance to the paddock to drop off vehicles and trailers or for early arrival when camping has been previously arranged is 5:30 pm.
  3. Paddock speed limit is 10mph or less.
  4. Keep fire lanes open at all times.
  5. Unauthorized vehicles including ATV’s, golf carts, motorized bikes, scooters, or skateboards are NOT allowed on the racetrack at Thunderhill Park. No one under 16 allowed on any ATV, golf cart, motorized bike, or scooter.
  6. People may walk or ride a bicycle on the track after hours with permission from Thunderhill Raceway Park management.
  7. Recycle Bins Are available in the paddock area; please use them appropriately.
  8. Please do not throw trash on the ground. There are trash cans throughout the paddock.
  9. Illegal drugs, explosives, guns, bows and arrows, sling shots, and similar devices are prohibited. Anyone found with these items will be asked to leave the property.
  11. Pets allowed into the track must be on a leash at all times. Please clean up after your pet. Pet access is a privilege not a right. The track reserves the right to deny pet access to the property at any time.
  12. No open campfires or barrel fires are allowed. Only contained, manufactured barbeques and grills are permitted.
  13. No race engines can be run before 7:30 am or after 6:00 pm Quiet time is from 10pm – 7:30am. Please be courteous to your neighbors by not playing loud music or making loud noises between these hours.
  14. No waste water dumping is allowed. There are RV dump areas a few miles from track. Please see Thunderhill Park Management for directions.
  15. Offensive signs, public drunkenness and loud profanity will not be tolerated.
  16. The selling of unauthorized merchandise is not permitted.
  17. Please do not overload the electrical hookups with excessive cords, etc. as you may cause outages for your neighbors.
  18. Thunderhill Raceway Park is not responsible for theft, damage, or loss of property.

2023 Tire Rack SCCA Time Trials National Tour at Thunderhill Raceway Park
Powered by Hagerty

April 14th - 16th, 2023 — Event Schedule

*subject to change

Friday, April 14th

5:30PM Gates Open
6:00PM Check-In/Tech Open
7:00PM Check-In/Tech Closed

Saturday, April 15th

6:45AM Worker Meeting (Location TBA) 
7:00AM Check-In/Tech Open
8:30AM Driver Briefing - (Location TBA)
9:00AM Paced Laps
9:20AM Yellow Group - Practice Session 1
9:40AM Red Group - Practice Session 1
10:00AM Purple Group - Practice Session 1
10:20AM Yellow Group- Practice Session 2 
10:40AM Red Group - Practice Session 2
Purple Group - Practice Session 2
11:20AM Break
11:30AM TT - Yellow Group -Time Attack 1: Session 1
11:50AM TT - Red Group -Time Attack 1: Session 1
12:10PM TT - Purple Group - Time Attack 1: Session 1
12:30PM Lunch - TT Check-In/Tech Closed - TNiA Check-In/Tech Open - Touring Laps
1:30PM TT - Yellow Group - Time Attack 1: Session 2 
1:50PM TT - Red Group - Time Attack 1: Session 2
2:10PM TT - Purple Group - Time Attack 1: Session 2
2:30PM Break - TNiA Check-In/Tech Closed
2:40PM TNiA Paced Laps
3:00PM  TNiA Advanced
3:20PM TNiA Intermediate
3:40PM TNiA Novice
4:00PM TNiA Advanced
4:20PM TNiA Intermediate
4:40PM TNiA Novice
5:00PM TNiA Advanced
5:20PM TNiA Intermediate
5:40PM TNiA Novice
6:00PM Course Closed and Hagerty Social Dinner Party - All Participants

Sunday, April 16th

Driver's Briefing
TT - Purple Group - Time Attack 2: Session 1
TT - Red Group - Time Attack 2: Session 1
TT - Yellow Group -Time Attack 2: Session 1
TT - Purple Group - Time Attack 2: Session 2
TT - Red Group - Time Attack 2: Session 2
TT - Yellow Group -Time Attack 2: Session 2
TT - Purple Group - Time Attack 2: Session 3
TT - Red Group - Time Attack 2: Session 3
TT - Yellow Group -Time Attack 2: Session 3
12:20PM Lunch - TT/TE Check-In/Tech Closed
TT - Purple Group - Time Attack 3: Session 1
TT - Red Group - Time Attack 3: Session 1
TT - Yellow Group - Time Attack 3: Session 1
TT - Purple Group - Time Attack 3: Session 2
TT - Red Group - Time Attack 3: Session 2
TT - Yellow Group - Time Attack 3: Session 2
3:30PM Course Closed
4:00PM Koni Podium

Hagerty On-track Insurance:
You CAN get Hagerty on track insurance for your vehicle for this event. To get information and a quote, go to https://www.hagerty.com/insurance/track-day-insurance

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A. PAYMENTS, WITHDRAWALS & REFUNDS: Credit card payment is required for online registration. A full refund will be given for cancellations made 2 weeks before the event start date. A $100 cancellation fee will be charged for cancellations made within 2 weeks of event start date. Any withdrawal or cancellation of your registration should go through my.scca.com by going to "My Events", finding your event, and clicking "cancel" to submit a cancellation request. If you have any additional questions, please reach out to the Time Trials team at timetrials@scca.com.


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Ahmed S.

Ahmed Shmara

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Pleasanton, CA
Ahren Eugene Renner

Ahren Eugene Renner

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Alex P.

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Alex S.

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Allen Chen

Allen Chen

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Andrew Maffessanti

Andrew Maffessanti

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Anthony P.

Anthony Pelayo

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Ben French

Ben French

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Carrie W.

Carrie Willhoff

Unlimited 1
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Curtis Z.

Curtis Zhi

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David H.

David Haro

Max 4
Riverside, CA
David M Keeney

David Keeney

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Eric Shin

Eric Shin

Tuner 3
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Gary Peterson

Gary Peterson

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Gene H.

Gene Hedrick

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Grey L.

Grey Lunk

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James Moss

James Moss

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Jason Lesher

Jason Lesher

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Jedwyn Taasin

Tuner 4
Stockton, CA
John Subosits

John Subosits

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Menlo Park, CA
Joseph D.

Joseph Drane

Max 4
Dublin, CA

Khoa Cao

Max 4
San Jose, CA
Lucas French

Lucas French

Max 3
Citrus heights, CA
Manfred O.

Manfred Oesting

Tuner 5
Loomis, CA
Michael Huber

Michael Huber

Max 1
Redding, CA
Robert J Luis

Robert J Luis

Tuner 2
Rohnert Park, CA
Russell Bowlus

Russell Bowlus

Sport 5
Davis, CA
Ryan Grow

Ryan Grow

Tuner 3
Elk Grove, CA
Sam Strano

Sam Strano

Sport 6
Sergei S Avedisov

Sergei S Avedisov

Tuner 4
Ann Arbor, MI
Shelly Y. Monfort

Shelly Y. Monfort

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Saratoga, CA
Skyler B.

Skyler Kai Burton

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Dixon, CA
Steven C.

Steven Case

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Oakdale, CA
Taylour Royal Wargo

Taylour Royal Wargo

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Blaine, WA
Tom A Bruck

Tom Bruck

Max 3
Meridian, ID
Tony R Rodriguez

Tony R Rodriguez

Max 4
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Tyler William Packard

Tyler William Packard

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Palo Alto, CA
Zeyu Z.

Zeyu Zhao

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Jacqueline Clow

Jacqueline Clow

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