Thunderhill Raceway Park

Last updated
Thunderhill Raceway Park
Thunderhill Raceway Park.svg
Location Glenn County, west of Willows, California, United States
Coordinates 39°32′25.2″N122°19′50.5″W / 39.540333°N 122.330694°W / 39.540333; -122.330694
Address5250 Highway 162
Major events Trans-Am Series
National Auto Sport Association
25 Hours of Thunderhill

Thunderhill Raceway Park is a motorsports complex located 7 miles west of Willows, California, United States, in the Sacramento Valley. It is the venue for the longest automobile race in the United States, the 25 Hours of Thunderhill, held annually during the first weekend in December. [1]


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 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.


Thunderhill Raceway Park was built in 1993 originally as a 1.9-mile, 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. [2]

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. [3]

Related Research Articles

<span class="mw-page-title-main">Sonoma Raceway</span> Motorsport track in California, United States

Sonoma Raceway is a road course and dragstrip located at Sears Point in the southern Sonoma Mountains of Sonoma County, California. The road course features 12 turns on a hilly course with 160 ft (49 m) of total elevation change. It is host to one of the few NASCAR Cup Series races each year that are run on road courses. It has also played host to the IndyCar Series, the NHRA Camping World Drag Racing Series, and several other auto races and motorcycle races such as the American Federation of Motorcyclists series. Sonoma Raceway continues to host amateur, or club racing events with some open to the public. The largest such car club is the Sports Car Club of America. The track is 30 mi (48 km) north of San Francisco and Oakland.

<span class="mw-page-title-main">Laguna Seca</span> Motorsport track in the United States

Laguna Seca Raceway is a paved road racing track in central California used for both auto racing and motorcycle racing, built in 1957 near both Salinas and Monterey, California, United States.

<span class="mw-page-title-main">Memphis International Raceway</span> Motorsport track in the United States

Memphis International Raceway was an auto racing park located near the Loosahatchie River in Shelby County, Tennessee, United States, just approximately ten miles south of Millington, and a few miles north of the city of Memphis.

<span class="mw-page-title-main">Sebring International Raceway</span> Motorsport track in the United States

Sebring International Raceway is a road course auto racing facility in the southeastern United States, located near Sebring, Florida.

<span class="mw-page-title-main">Gateway Motorsports Park</span> Motorsport track in Madison, IL, US

World Wide Technology Raceway is a motorsport racing facility in Madison, Illinois, just east of St. Louis, close to the Gateway Arch. It features a 1.250 mi (2.012 km) oval that hosts the NASCAR Cup Series, NASCAR Craftsman Truck Series, and the NTT IndyCar Series, a 2.000 mi (3.219 km) infield road course used by SpeedTour TransAm, SCCA, and Porsche Club of America, a quarter-mile NHRA-sanctioned drag strip that hosts the annual NHRA Camping World Drag Racing Series Midwest Nationals event, and the Kartplex, a state-of-the-art karting facility.

<span class="mw-page-title-main">Portland International Raceway</span> Motorsport track in the United States

Portland International Raceway (PIR) is a motorsport facility in Portland in the U.S. state of Oregon. It is part of the Delta Park complex on the former site of Vanport, just south of the Columbia River. It lies west of the Delta Park/Vanport light rail station and less than a mile west of Interstate 5.

<span class="mw-page-title-main">Pikes Peak International Raceway</span> Motorsport track in the United States

Pikes Peak International Raceway (PPIR) is a racetrack in the Colorado Springs area within the city limits of Fountain, Colorado, that by October 12, 1997, was "the fastest 1-mile paved oval anywhere". The speedway hosted races in several series including the Indy Racing League and two NASCAR series until operations were suspended from August 2005. A wide variety of amateur racing groups use PPIR for racing and training as the circuit is now closed to sanctioned professional auto racing due to the purchase of the track by PPIR LLC from NASCAR/ISC in 2008 after the track was put up for sale in 2006. The sale included a clause that prohibited sanctioned professional auto racing, as well as the need for additional safety upgrades at a cost of $1 million+ for professional racing series that the new ownership had no interest in implementing with the clause in place.

<span class="mw-page-title-main">Altamont Raceway Park</span> Race track in Tracy, California, United States

Altamont Raceway Park is a motorsports race track in the western United States, located in northern California, west of Tracy. It opened on July 22, 1966, and operated under the names Altamont Speedway, Altamont Raceway, Altamont Motorsports Park, Altamont Raceway Park and Arena, and Bernal Memorial Raceway. After 42 years of operation, the speedway closed in October 2008; the site is just south of the junction of Interstates 205 and 580.

<span class="mw-page-title-main">Utah Motorsports Campus</span> Motorsport venue in the United States

Utah Motorsports Campus is a race track facility located in Grantsville near Tooele, Utah, United States. It operated under the name of Miller Motorsports Park from 2006 until October 2015. The course has hosted auto, motorcycle, bicycle and kart racing, along with corporate events.

<span class="mw-page-title-main">Willow Springs International Motorsports Park</span> Former NASCAR track

Willow Springs International Motorsports Park is located in Willow Springs near Rosamond, California, about 80 mi (130 km) north of Los Angeles. It is the oldest permanent road course in the United States. Construction began in 1952, with the inaugural race held on November 23, 1953. The main track is a 2.500 mi (4.023 km) long road course that is unchanged from its original 1953 configuration. The elevation changes and high average speeds make it a favorite of many road racing drivers.

<span class="mw-page-title-main">New Jersey Motorsports Park</span> Motorsports race track in Millville, New Jersey

New Jersey Motorsports Park is a road course "Motorsports Entertainment Complex" located in Millville, Cumberland County, New Jersey, United States. It has hosted races since opening in 2008 and currently hosts a schedule including MotoAmerica Pro Road Racing, 24 Hours of LeMons, American Historic Racing Motorcycle Association, SCCA events, SCCA Pro Racing's F2000 Championship Series. It is not to be confused with the New Jersey Motorsports Park: Field of Dreams, an unaffiliated Motocross facility across the street.

<span class="mw-page-title-main">Marlboro Motor Raceway</span>

Marlboro Motor Raceway (MMR) is a now-defunct motorsports park located in Prince George's County, just outside Upper Marlboro, Maryland. MMR closed after the 1969 season and local Sports Car Club of America (SCCA) racing moved to the more advanced Summit Point Motorsports Park due to safety concerns and issues with MMR's management. The remains of the track are still visible from U.S. Route 301 and the entire track layout can still be seen in modern satellite imagery.

Old Bridge Township Raceway Park, originally known as Madison Township Raceway Park, is an American auto racing facility located in Old Bridge Township, in Middlesex County, New Jersey, United States.

<span class="mw-page-title-main">Palm Beach International Raceway</span> Motorsport track in the United States

Palm Beach International Raceway was a motorsports facility located west of Jupiter, Florida. The facility had a quarter-mile drag strip, a 2.043 mi (3.288 km) road course, 7/10-mile kart track as well as mud racing tracks. The road course at Palm Beach International Raceway was a 2-mile, 10-turn circuit constructed of hot-mix asphalt and set on an aggregate base. It was 40 ft (12 m) wide with a 1/3-mile section measuring 80 ft (24 m).

Carl Rydquist is a Swedish-American FIA Silver and Trans-Am racing driver and a SAG-AFTRA licensed stunt and precision driver who has won many auto races and racing championships. Rydquist gained notoriety for his speed in 2001 when he beat more than 1100 enthusiasts and professional racedrivers in a gocart challenge created by Eurosport to promote their Super Racing Weekend FIA GT and ETCC sports coverage. The event propelled him to his first GT Endurance ride with Apex Racing's Porsche. Rydquist actively competes in racing and has competed in professional drifting. In Rydquist's auto racing career, he currently has a victory in more than one third of his races and podium finishes in three out of four Touring and GT car endurance and sprint races.

<span class="mw-page-title-main">Gridlife (festival)</span>

GRIDLIFE is a motorsports sanctioning body that hosts a series of music and motorsports festivals at racetracks across the United States. Racetrack venues that currently host Gridlife festivals include Carolina Motorsports Park, Watkins Glen International, GingerMan Raceway, Mid-Ohio Sports Car Course, Lime Rock Park, and WeatherTech Raceway Laguna Seca. Non-festival events are held at Autobahn Country Club, Road America, Heartland Motorsports Park, New Jersey Motorsports Park & more. GRIDLIFE events feature daytime events such as road racing, time attack, drifting, car shows and concerts with contemporary EDM, Hip Hop and Alternative music in the evenings.

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.

Jeff Shafer is a former racing driver. Shafer competed in USF2000, Atlantic Championship among other series.

Roger Eagleton is an American race car driver and entrepreneur, born in Glendale, California. He is currently based in Waikiki, Honolulu and is the 2019 Trans-Am West Coast Champion in the GT Class.

<span class="mw-page-title-main">Mason Filippi</span> American racing driver

Mason Filippi is an American auto racing driver who competes in the TCR class of the Michelin Pilot Challenge for Bryan Herta Autosport. He previously raced for Bryan Herta Autosport, finishing the Michelin Pilot Challenge in second place in 2019 and third in 2020. Filippi also piloted touring cars in the TC America Series and the Pirelli World Challenge from 2017 to 2019, finishing in the top five of the standings each season. Prior to racing touring cars, he drove Spec Miatas, competing in the Global MX-5 Cup and the Teen Mazda Challenge and winning the 25 Hours of Thunderhill race in 2015 and 2016.


  2. "Thunderhill Expansion new release 1997 (Web Archive)". Archived from the original on 1997-10-15.