| Year | Overall winner(s) | Entrant | Car | Distance/Duration | Race title | Report |
| SCCA National Championship |
| 1957 |
Carroll Shelby | John Edgar | Maserati 450S | 92.5 mi (148.9 km) | Riverside National Championship Sports Car Races | report |
| USAC Road Racing Championship |
| 1958 |
Chuck Daigh | Reventlow Automobile Incorporated | Scarab Mk II-Chevrolet | 200 mi (320 km) | United States Grand Prix for Sports Cars | report |
| 1959 |
Phil Hill | Eleanor von Neumann | Ferrari 250 TR 59 | 200 mi (320 km) | United States Grand Prix for Sports Cars | report |
| 1960 |
Bill Krause | Maserati Representatives of California | Maserati Tipo 61 | 200 mi (320 km) | Grand Prix for Sports Cars | report |
| 1961 |
Jack Brabham | Brabham Racing | Cooper Monaco T61-Climax | 200 mi (320 km) | Grand Prix for Sports Cars | report |
| 1962 |
Roger Penske | Updraught Enterprises | Cooper T53-Climax | 200 mi (320 km) | Los Angeles Times presents the Grand Prix for Sports Cars | report |
| Non-Championship |
| 1963 |
Dave MacDonald | Shelby American | Cooper Monaco T61M - Ford | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
| 1964 |
Parnelli Jones | Shelby American | Cooper Monaco T61-Ford | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
| 1965 |
Hap Sharp | Chaparral Cars | Chaparral 2A-Chevrolet | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
| Can-Am |
| 1966 |
John Surtees | Team Surtees | Lola T70 Mk.2-Chevrolet | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
| 1967 |
Bruce McLaren | Bruce McLaren Motor Racing | McLaren M6A-Chevrolet | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
| 1968 |
Bruce McLaren | Bruce McLaren Motor Racing | McLaren M8A-Chevrolet | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
| 1969 |
Denny Hulme | Bruce McLaren Motor Racing | McLaren M8B-Chevrolet | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
| 1970 |
Denny Hulme | Bruce McLaren Motor Racing | McLaren M8D-Chevrolet | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
| 1971 |
Denny Hulme | McLaren Cars, Ltd. | McLaren M8F-Chevrolet | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
| 1972 |
George Follmer | Roger Penske | Porsche 917/10 | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
| 1973 |
Mark Donohue | Roger Penske | Porsche 917/30 | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
| 1974: Not held |
| IMSA GT Championship |
| 1975 |
Hans-Joachim Stuck
Dieter Quester | BMW Motorsport | BMW 3.0 CSL | 6 hours | 6 Hours of Riverside | report |
| 1976–1978: Not held |
| 1979 |
Bill Whittington
Don Whittington | Whittington Brothers Racing | Porsche 935/79 | 6 hours | Los Angeles Times Grand Prix of Endurance | report |
| 1980 |
Dick Barbour
John Fitzpatrick | Dick Barbour Racing | Porsche 935 K3 | 5 hours | Los Angeles Times/Toyota Grand Prix of Endurance | report |
| 1981A |
John Fitzpatrick
Jim Busby | John Fitzpatrick Racing | Porsche 935 K3/80 | 6 hours | Los Angeles Times/Toyota Grand Prix of Endurance | report |
| 1982 |
Ted Field
Bill Whittington | Interscope Racing | Lola T600-Chevrolet | 6 hours | Times/Toyota Grand Prix | report |
| 1983 |
John Fitzpatrick
David Hobbs
Derek Bell | John Fitzpatrick Racing | Porsche 935 K4 | 6 hours | Times/Datsun Grand Prix | report |
| 1984 |
Randy Lanier
Bill Whittington | Blue Thunder Racing | March 84G-Chevrolet | 6 hours | Times/Nissan Grand Prix | report |
| 1985 |
Pete Halsmer
John Morton | BF Goodrich | Porsche 962 | 600 km (370 mi) | Times/Nissan Grand Prix of Endurance | report |
| 1986 |
Rob Dyson
Price Cobb | Dyson Racing | Porsche 962 | 6 hours | Times/Ford Grand Prix | report |
| 1987 |
John Morton
Hurley Haywood | Group 44 | Jaguar XJR-7 | 500 km (310 mi) | Los Angeles Times Grand Prix | report |