Home of the longest race in the US the 25 hour Thunderhill offers 3 distinct track configurations and a challenging course earning it the nickname of "Thunderschleife"
Built in 1993 funded by the San Francisco Region SCCA the track was expanded in 1997 to the present day 3-mile configuration and further expanded in 2013 with Thunderhill West which was then connected to the 3-mile configuration and made the 5 mile full course possible. Offering a spectator tower with sweeping views of the track, lots of shaded areas for your car when it's not on track, and well kept facilities to use the day of the event you'll have a great time on and off track at Thunderhill
