Thunderhill Raceway Park is a motorsports complex located 7 miles West of

Willows Willows, also called sallows and osiers, from the genus ''Salix'', comprise around 400 speciesMabberley, D.J. 1997. The Plant Book, Cambridge University Press #2: Cambridge. of typically deciduous trees and shrubs, found primarily on moist s ...

California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...

, in the Sacramento Valley. It is the venue for the longest automobile race in the United States, the

25 Hours of Thunderhill The 25 Hours of Thunderhill is an endurance racing event held annually during the first weekend in December in Northern California Northern California (colloquially known as NorCal) is a geographic and cultural region that generally comprises t ...

, held annually during the first weekend in December. Thunderhill has two tracks: the original 3 mile track known as Thunderhill East and a 2-mile track known as Thunderhill West. The two tracks can also be combined to offer a 5-mile track, the longest road course in America. Thunderhill also offers two large

skid pad A skidpad is a circular area of flat pavement used for various tests of a car's handling. The most common skidpad use is testing lateral acceleration, measured in meters per second squared (m/s2) or the scaled unit ''g''-force. This usage has ...

areas as well for drifting and car control events. The venue is available for a wide variety of events or functions. It can be rented for racing events, lapping day events, drifting events, go kart events, driving schools, ride and drive programs, corporate events, commercials, a movie location, trade shows, weddings, receptions, swap meets etc. San Francisco Region Properties, Inc., dba Thunderhill Park is the wholly owned subsidiary of the San Francisco Region Sports Car Club of America. Thunderhill Raceway has its own board of directors and is operated completely independently of the non-profit subsidiary.

History

Thunderhill Raceway Park was built in 1993 originally as a 1.9 mile long, 9 turn track. Following the closure of the Baylands Raceway in Fremont, CA, the purchase of the land and construction of Thunderhill was funded by the San Francisco Region Sports Car Club of America. In late 1997, the track was expanded to its present-day 3 mile configuration, adding six new turns, a bypass for the "cyclone" corner, and additional paved paddock space. Thunderhill West was conceptualized in 2013 and built in 2014 as a standalone track. Connectors were made to connect the original track with the new west track to make a five mile-long track. At the time of construction, this was the longest racetrack in California, and it gained the nickname "Thunderschleife" as a nod to the Nurburgring Nordschleife.

References

External links

Thunderhill Park Official Site25-Hours of Thunderhill Official SiteAmerican Federation of Motorcyclists (AFM) Official SiteNASA National Auto Sport Association Official Site
{{Trans-Am tracks Buildings and structures in Glenn County, California Motorsport venues in California Willows, California Tourist attractions in Glenn County, California Road courses in the United States