Orange County International Raceway was a combined 1/4-mile US dragstrip and 2-mile road course, plus a motocross track, located in Irvine, California adjacent to the Interstate 5 (I-5) Santa Ana Freeway. Under a lease agreement with the Irvine Company, OCIR – as it was known in racing circles – was in operation from August 5, 1967, until its closure on October 30, 1983. The track was so named because its founders envisioned hosting sports car, motorcycle, midget, and stock car races in addition to National Hot Rod Association (NHRA) sanctioned drag racing events. Known as 'The Supertrack', OCIR was designed to be the most modern of dragstrip facilities in the late 1960s, offering spectator comforts and conveniences never before available at a drag race facility in Southern California. The track construction included the extensive use of landscaping, permanent restrooms and concession stands, reserved seats with backs, drinking fountains installed throughout, the sport's first electric scoreboard and a 40-foot-high, four-story, glass-enclosed control tower and administration building. The well-known Bob Bondurant School of High Performance Driving was founded at the track in 1968.