One of the United States' finest hidden gems for road racers, Rosamond, California's Willow Springs International Motorsports Park is a complex of multiple diverse and challenging courses. Headlined by the 2.5-mile Willow Springs Raceway, also known as "Big Willow," the facility opened in November 1953, making it the oldest permanent road course in America; in 1996, it was also declared a California Point of Historical Interest.

"Big Willow" features challenging elevation changes, technical corners, and one of the most picturesque backgrounds of any circuit in the west. The nine-turn layout begins with a hard left-hander coming off of the long frontstretch, but it also features multiple long, sweeping right-handers and a tricky complex comprising Turns 3 through 5. The track has hosted everything from the NASCAR Cup Series in the 1950s to budget-level endurance racing in modern times. It's also beloved among the amateur racing community for producing exciting racing with an approachable but fun layout.