NASCAR Cup Series at Ontario Motor Speedway
| NASCAR Winston Cup Series | |
|---|---|
| Venue | Ontario Motor Speedway |
| Corporate sponsor | Los Angeles Times |
| First race | 1971 |
| Last race | 1980 |
| Distance | 500 miles (805 km) |
| Laps | 200 |
| Previous names | Miller High Life 500 (1971–1972) Los Angeles Times 500 (1974–1980) |
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Stock car races in the NASCAR Cup Series were held at Ontario Motor Speedway in Ontario, California, United States, in February from 1971 to 1972 and in November from 1974 to 1980. Benny Parsons is the final winner of this race.