Willow Springs International Motorsports Park is located in Willow Springs near Rosamond and Lancaster, California, about an hour north of Los Angeles. It is a historic race track, in existence more than 60 years. It is the oldest permanent road course in the United States. Construction began in 1952, with the inaugural race held on November 23, 1953. The main track is a challenging 2.5-mile (4.0 km) long road course that is unchanged from its original 1953 configuration.