National Auto Sport Association
  NASA 12 Hour Enduro  

NASA Presents United Rentals 12 Hours of Thunderhill

Entry Form | Class Descriptions | Rules for this Enduro | Sponsors | Track and Pit Maps

View the Team Results!

Glenn County Deputy Sheriff’s encouraged speeding for a good cause.

NASA proudly presents the only long distance race on the west coast in 2002. Come join top drivers in this annual assault on Thunderhill Raceway Park in Willows, CA.

This will be the fifth year NASA has organized this unique race and believes it will be one of the best years ever. Last year's starting grid saw some 40 cars take the green and expect to bring more competition this year. Being the only 12 hour race on the west coast brings teams from all over the country to compete in this prestigious event. Each year the entries are comprised of top teams with drivers such as Ken Dobson, Roger Foo, Barry Hartzel and Randy Pobst! And if that's not enough, each driver will receive a commemorative t-shirt.

Two drivers minimum are required, but there is no maximum. The $450 entry covers the cost of the first two drivers and each additional driver is $100. Get as many drivers as you'll need because this event raises money for charity: the Police Athletics League of Willows and Willow's High School Senior Class.

Are you ready to push yourself to the edge and find out how good you really are? If so, this is your chance to pit yourself against some of the top talent in the country and see if you have what it takes to sit on the podium of this prestigious event. Space is limited, so enter soon!


Clif Bar Inc. provides energy for the United Rentals 12 Hour Endurance Race Presented by NASA.

United Rentals provides equipment and technology to run the 12 Hours of Thunderhill.

Toyo Tires will be awarding race tires to the first place team for each class. will be awarding certificates to the top finishing teams for free graphics work.

Bobcat Bicycles will be giving away a free bicycle to the first place finisher in each class!

Hella will provide a 5% discount off and a free Model 500 kit to the winner of each class (5 classes), if they used Hella lighting in the race.

Cobalt Friction, suppliers of custom brake compounds will be providing gift certificates to the top 3 finishers of each class.

Event Schedule:

Thursday, December 5th: NO ACCESS

Friday, December 6th
All day - track testing: Register and pay at the track. Call 530-934-4455 if planning to test.
11:00 AM NASA Tech and Registration opens.
5:00 PM – 5:30 PM warm-up / practice (103 dBA)
5:30 PM – 6:00 PM qualifying.
6:30 PM – interviews with requested drivers will take place at Race Central.

Saturday, December 7th
7:00 AM late registration.
7:30 AM Officials and Flaggers meeting at T&S
8:05 AM Driver’s meeting. Mandatory for at least the team owner. Driver attendance recommended.
8:35 AM Announcements and memorial tribute. ALL WORK MUST CEASE! Details TBA
8:45 AM Teams prepare. Warm Race engines.
8:50 AM National Anthem. Drivers in car, ALL WORK MUST STOP. NO RUNNING ENGINES!
8:52 AM Three minute board. Resume warming engines.
8:55 AM Pace car takes the track. (103 dBA)
6:00 PM Sound limit reduces to 98 dBA.
8:55 PM checkered flag next time leader comes by!


This race will be run according to NASA's Enduro Supplement.
You can download the Enduro Supplement
Additional specific rules for this event can be found here (Word .DOC) or here (HTML).

Track and Pit & Paddock Maps

Track Map
Pit & Paddock Map


ES (Unlimited):
  • Anything goes with fenders. Usual cars include World Challenge GT,
    Grand Am Cup Grand Sport, ALMS cars, NASCAR type stock cars.
  • USTCC, CMC, PS-1 (Integra R, 13B RX7, 240Z, Mustang 5.0, 325i, 944).
  • SCCA classes: ITS, most T-2 cars, most World Challenge Touring.
  • Grand AM class: STI.
  • SM, Pro-7, PCTCC, PS-2 (Integra LS, Civic SOHC, 12A RX7, Miata).
  • SCCA classes: SSB, ITA.
  • Grand Am class: STII.
  • GTI, PS-3 (VW 8V, 2002, 510).
  • SCCA classes: SSC, ITB, ITC.
  • Legends, Sports Racers


Entry Form
- Fax completed forms to 510-412-0549.

About NASA
The National Auto Sport Association sanctions High Performance Driving Events at racing facilities across the country. Whether you would like to learn how to control your car at high speeds, or you are an experienced driver looking for more track time, NASA has an event for you. Click for more information: High Performance Driving Event and About NASA