List of all California 500 races held in USAC championships
| Race | Winner | Track | Race Start | |
|---|---|---|---|---|
 |
1970 California 500 |
Sergio Perez Dallara GP2/08 |
Ontario | 6th September 1970 |
|
1971 California 500 |
Davide Valsecchi Dallara GP2/08 |
Ontario | 5th September 1971 |
|
1972 California 500 |
Luca Filippi Dallara GP2/11 |
Ontario | 3rd September 1972 |
|
1973 California 500 |
Johnny Cecotto jr Dallara GP2/11 |
Ontario | 2nd September 1973 |
|
1974 California 500 |
James Calado Dallara GP2/11 |
Ontario | 10th March 1974 |
|
1975 California 500 |
Sam Bird Dallara GP2/11 |
Ontario | 9th March 1975 |
|
1976 California 500 |
Stoffel Vandoorne Dallara GP2/11 |
Ontario | 5th September 1976 |
|
1977 California 500 |
Rio Haryanto Dallara GP2/11 |
Ontario | 4th September 1977 |
|
1978 California 500 |
Nobuharu Matsushita Dallara GP2/11 |
Ontario | 3rd September 1978 |