Thunderhill 5 Mile Cyclone w/ West Bypass
Thunderhill Raceway Park is a motorsport complex located in northern California, an hour and a half drive away from Sacramento. It is without a doubt the most versatile racing facility in America, having several possible layouts such as 2-mile, 3-mile, and 5-mile road courses, as well as a 315’ x 550’ skidpad and a 662’ x 363’ autocross pad. Thunderhill follows designs planned by Steve Crawford, who envisioned building two independent road courses next to one another: a 2.87 miles East track and a West track with 1.99 miles. The 5-mile combination of both racetracks forms the longest road course in the United States.
Thunderhill East started operations in 1993, adding the West course in 1995. The East track takes advantage of the natural elevation changes in the field, having 15 exhilarating turns where drivers often lose sight of what is coming right ahead of them. The straight segments are ample and long enough to allow easy passing between drivers. Thunderhill West is more technical, requiring top driving skills to leverage momentum while taking its ten turns, which come in quick succession. The 25 Hours of Thunderhill, the most famous event of the circuit and longest endurance racing competition in America, takes place on the combined 5-mile road course since 2003.
The 5 Mile Cyclone with West Bypass configuration at Thunderhill Raceway in California combines the facility's longest routing with a bypass section creating a unique 5-mile layout challenge. The Cyclone designation indicates the extended counter-clockwise flow, while the West Bypass adds an alternative routing element avoiding or replacing specific sections. This configuration creates one of America's longest road course variants, serving endurance events and advanced track day groups.
Operating the 5 Mile Cyclone with West Bypass showcases Thunderhill's exceptional infrastructure where multiple course sections combine creating configurations from 2 to 5 miles at Northern California's premier club racing facility. The 5-mile length provides substantial endurance racing capability. California's Central Valley climate creates year-round racing potential though summer heat frequently exceeds 40C. The Cyclone with West Bypass configuration demonstrates Thunderhill's role as America's longest permanent road course, serving San Francisco Bay Area motorsport community with comprehensive layout variety.
