Английская Википедия:25 Hours of Thunderhill
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The 25 Hours of Thunderhill is an endurance racing event held annually during the first weekend in December in Northern California, at the Thunderhill Raceway Park; just outside the small city of Willows. The race is longest road event on a closed course in the United States.
It has been run since 2003,[1] sanctioned by the National Auto Sport Association.[2] It is the successor to the Timex 12 Hours of Thunderhill event run between 1998 and 2002.[3]
References
Шаблон:Automobile endurance races