to Formula One and Formula A cars. NASCAR Winston Cup history Lap Records The fastest ever qualifying lap on the 2.5-mile Oval is 44.325 seconds, set by Rick Mears in a Penske PC-7, during qualifying for the 1979 California 500. The fastest lap on the original 3.194-mile Road Course is 1:41.257, set by Jackie Stewart in a Tyrrell 001, during qualifying for the 1971 Questor Grand Prix. The official race lap records at Ontario Motor Speedway are listed as: See also Riverside International Automotive Museum References External links Motorsport venues in California Sports in Ontario, California NASCAR tracks Defunct motorsport venues in the United States Demolished sports venues in California Sports venues in San Bernardino County, California Sports venues in the Inland Empire IMSA GT Championship circuits Champ Car circuits Sports venues completed in 1970 1970 establishments in California 1980 disestablishments in California Defunct companies based in Greater Los Angeles