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  2. Thunderhill Raceway Park - Wikipedia

    en.wikipedia.org/wiki/Thunderhill_Raceway_Park

    Thunderhill Raceway Park is a motorsports complex located 7 mi (11 km) 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.

  3. 2025 Formula Car Challenge - Wikipedia

    en.wikipedia.org/wiki/2025_Formula_Car_Challenge

    Thunderhill Raceway Park, Willows: April 4–6 San Francisco Region SCCA Series Formula Pro USA Western Championship: R4 3 R5 Thunderhill Raceway Park, Willows: May 16–18 San Francisco Region SCCA Series: R6 4 R7 Portland International Raceway, Portland: June 13–15 International Conference of Sports Car Clubs Cascade Sports Car Club Series ...

  4. 25 Hours of Thunderhill - Wikipedia

    en.wikipedia.org/wiki/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, 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.

  5. 2025 Formula Pro USA Western Championship - Wikipedia

    en.wikipedia.org/wiki/2025_Formula_Pro_USA...

    Sonoma Raceway, Sonoma: September 12–14 NASA Northern California Region Formula Car Challenge: R8 5 R9 Thunderhill Raceway Park, Willows: October 24–26 San Francisco Region SCCA Series Formula Car Challenge: R10 6 R11 Buttonwillow Raceway Park, Buttonwillow: November 14–16 California Sports Car Club Formula Car Challenge: R12

  6. 2024 Formula Car Challenge - Wikipedia

    en.wikipedia.org/wiki/2024_Formula_Car_Challenge

    Sonoma Raceway, Sonoma: 31 August San Francisco Region SCCA Series Formula Pro USA Western Championship: R12 1 September 7 R13 Thunderhill Raceway Park, Willows: 25 October San Francisco Region SCCA Series: R14 26 October 8 R15 Buttonwillow Raceway Park, Buttonwillow: 16 November California Sports Car Club Formula Pro USA Western Championship ...

  7. 2024 Formula Pro USA Western Championship - Wikipedia

    en.wikipedia.org/wiki/2024_Formula_Pro_USA...

    The 2024 season began at Thunderhill Raceway Park, where Kiwi Motorsports driver Landan Matriano Lim secured pole position for both races. Lim delivered a commanding performance in the F3 class, claiming victories in both events and recording the fastest lap in each.

  8. 2023 Formula Car Challenge - Wikipedia

    en.wikipedia.org/wiki/2023_Formula_Car_Challenge

    Buttonwillow Raceway Park, Buttonwillow: 29 April Formula Pro USA Western Championship California Sports Car Club: 6 30 April 7 Thunderhill Raceway Park, Willows: 3 June Formula Pro USA Western Championship San Francisco Region SCCA Series: 8 4 June 9 WeatherTech Raceway Laguna Seca, Monterey: 29 July San Francisco Region SCCA Series Pacific ...

  9. Trans-Am Series - Wikipedia

    en.wikipedia.org/wiki/Trans-Am_Series

    On the 2019 West Coast Championship schedule, the season is one race longer (6), and opens a couple of weeks earlier at Willows, California's Thunderhill Raceway Park. The shared event at Laguna Seca takes place in early May, with Sonoma moving from early June to mid-June, replacing the shared event at the Indianapolis Motor Speedway.