National Auto Sport Association

Registration Announcement for NASA 25hrs of Thunderhill - Presented by Hawk Performance

NAPA VALLEY, CA (August 16, 2016) Registration for the longest endurance road race in North America will open on Friday August 19 at 9am PST.  Be part of 14th annual running of the NASA 25hrs of Thunderhill presented by Hawk Performance on December 3-4, 2016.

Will the Flying Lizard Audi sponsored by Toyo Tires be back to defend the title or will we have a new champion for 2016?  If you missed the 2015 NASA 25hrs please check out a documentary entitled “Survive the 25” which originally premiered on the Mav TV network. It chronicles the experiences of 4 race teams competing in the longest endurance race in North America held each December at Thunderhill Raceway Park in Willows, California. You can watch the show in its entirety by going to .

Sign up for the hardest race you will ever run. Just finishing this race is a victory by itself. The 25hrs will challenge you, teach you, make you better, make your team better, and most of all give you some amazing memories of a unique accomplishment. 

For more information on the 25 Hours of Thunderhill presented by Hawk Performance, please visit

The National Auto Sport Association (NASA) was formed in 1991 with the premise of delivering high-quality motorsports events to enthusiasts at major racing venues throughout the nation. NASA has created programs that allow owners of both racecars and high-performance street-driven vehicles to enjoy the full performance capabilities of their cars in a controlled professionally managed environment. NASA offers many different programs that will allow you to enjoy motorsports on a number of different levels, including our High Performance Driving Events (HPDE), Rally Sport, Time Trial, NASA-X and Competition Racing programs.

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