ONTARIO, CA - An aerial view of the Ontario Speedway during the latter stages of construction in early 1970. Designed as a twin to the Indianapolis (IN) Motor Speedway, the track hosted NASCAR, Indy Car and NHRA Drag Racing events from AUGUST 1970 through NOVEMBER 1980. The speedway was also the venue for the Questor Grand Prix Formula One event in 1971. (Photo by ISC Images & Archives via Getty Images)
