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Club · Thunderhill Raceway Park · Willows, CA

GRIDLIFE Thunderhill and the 25 Hours of Thunderhill

Fri, Apr 2 – Sun, Apr 4, 2027

GRIDLIFE season opener; World Racing League revives the 25-hour enduro, starting Saturday afternoon and finishing Sunday. No 25-hour race at Thunderhill in December 2026. Start time TBA.

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Race weekend

Forecast not open yet

The hour-by-hour forecast for this weekend opens in 147 days, seven days before the first on-track day.

Right now at Thunderhill Raceway Park: 62°17°, overcast, wind 6 mph10 km/h ESE. Green flag today.

Thunderhill Raceway Park forecast now

This time of year here

The last 10 years at Thunderhill

Rain fell on 3 of the last 10 race-day weekends here; the hottest was 86°30° in 2021.

Year by year

The dates, high and low, rain and gusts for each of the last 10 race weekends here. Part of Raceway Weather Pro.

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Weather on the same weekend of the year at this track, from the Open-Meteo archive; past editions may have run on other dates.

The weekend

Facts

Series
Club
Track
Thunderhill Raceway Park, Willows, CA
Dates
Fri, Apr 2 – Sun, Apr 4, 2027
Main event
Sat, Apr 3
Usual weekend
New for 2027: first weekend of April (the NASA-era 25 Hours ran the first weekend of December through 2023)
Date status
Confirmed date
Weight
Major event
Notes
GRIDLIFE season opener; World Racing League revives the 25-hour enduro, starting Saturday afternoon and finishing Sunday. No 25-hour race at Thunderhill in December 2026. Start time TBA.
Club

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