Thunderhill Raceway Park

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Track Summary

Web Site:

Questions forum: Driving Thunderhill Park Raceway forum

Address: 5250 State Highway 162, Willows, CA 95988

Upcoming Events Thunderhill Raceway Park Track Schedule

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Track Map



Current Conditions: Clear in Willows, CA (as of 1:00 AM 8/10/2014)

Current conditions (as of 1:00 AM)
Clear. 69°F (Feels like 69). Humidity: 57% Winds: 5 mph SSW.
All times shown are local to Willows, CA.
Detailed ten-day forecast   Hourly weather forecast    Weather maps    Weather averages

Forecast for Sunday, August 10, 2014 for Willows, CA

Today: Partly Cloudy.Partly Cloudy Lo: 64°F. Hi: 89°F. Chance of precipitation: 0%
Tomorrow: Scattered Thunderstorms.Scattered Thunderstorms Lo: 64°F. Hi: 93°F. Chance of precipitation: 20%
Tuesday: Partly Cloudy.Partly Cloudy Lo: 64°F. Hi: 89°F. Chance of precipitation: 0%
Wednesday: Sunny (Clear).Sunny (Clear) Lo: 63°F. Hi: 89°F. Chance of precipitation: 0%
Thursday: Sunny (Clear).Sunny (Clear) Lo: 64°F. Hi: 92°F. Chance of precipitation: 0%

More information at MSN Weather
(Data provided outside US and Canada by Foreca, Data provided for US and Canada by WDT)


This is one of the most popular club racing track in northern California. The track has grown in popularity over the last several years and is host to many NASA and SCCA club series racing. The 25 Hour of Thunderhill is held there and is the longest endurance road race in the world.

The track is configurable and event organizers can choose from several configurations to run. The most typical configuration is counter-clockwise without the T5 bypass. The track was designed to run both directions, so driving clockwise is referred to as "Llihrednuht" or "Thunderhill backwards".

Track Guide

The follow sections describe the turns or series of turns on the race track in a step by step detail from various people who have driven the track

External Links

GPS Track Map and Vehicle Dynamics

G2X Trackmap: Thunderhill Counter Clockwise

Typical Lap Times

Formula Mazda Pro 1:40.9
D Sports Racer race record, John Hill, Stohr WF1, 03/18/2006 1:42.071, 2.866 miles, 16 turns CCW w/o bypass
Spec Miata 2:08.235
Spec Racer Ford 2:02.491
Porsche 944 spec 2:12.9
Porsche 997RSR with professional driver 1:45
Porsche 997 GT3 RS with prof driver 2:02
Stock Acura NSX w/street tires driven by Kenji Morishige 2:09 with bypass, 2:11 w/o bypass
Prima Racing 1992 Civic EG driven by Kenji Morishige 2:09.xx 2005 NASA Race Weekend
Prima Racing 1999 Civic Si driven by Andrie Hartanto 2:02.869 2005 NASA Race Weekend
Shed Racing 1983 VW Rabbit GTI Cup driven by Ron Swett 2:13.567 2005 NASA Race Weekend
2003 Mitsubishi Evo 8 #42 NASA TTB driven by Yang Tang 2:02.254 2007 NASA Track record w/ bypass
Spec E30, Donny Edwards 2:08.712 8/23/2008 NASA Race w/bypass
American Iron spec 1985 mustang Vageli Karas 1:57.179 (bypass t-5)


Video of Thunderhill in a Spec Ford

Video of Thunderhill in a racecar

Video of Thunderhill Clockwise with Bypass in a BMW M3

Video of Thunderhill, Counter-Clockwise with Bypass, NASA GTI Cup class lap record

More videos on the web

Videos at YouTube Videos at Google