Thunderhill Raceway 5-Mile

Willows, California, United States

Thunderhill Raceway Park sits west of Willows, California, and combines its original Thunderhill East circuit with the newer Thunderhill West track to form a roughly five-mile configuration nicknamed "Thunderschleife" after the Nurburgring Nordschleife. The East layout opened in 1993 as a 9-turn track and was expanded in 1997, while West was built in 2014 to create the combined circuit, which was the longest racetrack in California at the time. The source provides no record of motorcycle racing at the venue.