| Year | Overall winner(s) | Entrant | Car | Distance/Duration | Race title | Report |
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| SCCA National Championship |
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| 1957 | Carroll Shelby | John Edgar | Maserati 450S | 92.5 mi (148.9 km) | Riverside National Championship Sports Car Races | report |
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| USAC Road Racing Championship |
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| 1958 | Chuck Daigh | Reventlow Automobile Incorporated | Scarab Mk II-Chevrolet | 200 mi (320 km) | United States Grand Prix for Sports Cars | report |
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| 1959 | Phil Hill | Eleanor von Neumann | Ferrari 250 TR 59 | 200 mi (320 km) | United States Grand Prix for Sports Cars | report |
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| 1960 | Bill Krause | Maserati Representatives of California | Maserati Tipo 61 | 200 mi (320 km) | Grand Prix for Sports Cars | report |
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| 1961 | Jack Brabham | Brabham Racing | Cooper Monaco T61-Climax | 200 mi (320 km) | Grand Prix for Sports Cars | report |
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| 1962 | Roger Penske | Updraught Enterprises | Cooper T53-Climax [1] | 200 mi (320 km) | Los Angeles Times presents the Grand Prix for Sports Cars | report |
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| Non-Championship |
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| 1963 | Dave MacDonald | Shelby American | Cooper Monaco T61M - Ford | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
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| 1964 | Parnelli Jones | Shelby American | Cooper Monaco T61-Ford | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
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| 1965 | Hap Sharp | Chaparral Cars | Chaparral 2A-Chevrolet | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
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| Can-Am |
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| 1966 | John Surtees | Team Surtees | Lola T70 Mk.2-Chevrolet | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
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| 1967 | Bruce McLaren | Bruce McLaren Motor Racing | McLaren M6A-Chevrolet | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
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| 1968 | Bruce McLaren | Bruce McLaren Motor Racing | McLaren M8A-Chevrolet | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
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| 1969 | Denny Hulme | Bruce McLaren Motor Racing | McLaren M8B-Chevrolet | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
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| 1970 | Denny Hulme | Bruce McLaren Motor Racing | McLaren M8D-Chevrolet | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
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| 1971 | Denny Hulme | McLaren Cars, Ltd. | McLaren M8F-Chevrolet | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
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| 1972 | George Follmer | Roger Penske | Porsche 917/10 | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
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| 1973 | Mark Donohue | Roger Penske | Porsche 917/30 | 200 mi (320 km) | Los Angeles Times Grand Prix | report |
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| 1974: Not held |
| IMSA GT Championship |
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| 1975 | Hans-Joachim Stuck Dieter Quester | BMW Motorsport | BMW 3.0 CSL | 6 hours | 6 Hours of Riverside | report |
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| 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 |
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| 1980 | Dick Barbour John Fitzpatrick | Dick Barbour Racing | Porsche 935 K3 | 5 hours | Los Angeles Times/Toyota Grand Prix of Endurance | report |
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| 1981 A | John Fitzpatrick Jim Busby | John Fitzpatrick Racing | Porsche 935 K3/80 | 6 hours | Los Angeles Times/Toyota Grand Prix of Endurance | report |
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| 1982 | Ted Field Bill Whittington | Interscope Racing | Lola T600-Chevrolet | 6 hours | Times/Toyota Grand Prix | report |
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| 1983 | John Fitzpatrick David Hobbs Derek Bell | John Fitzpatrick Racing | Porsche 935 K4 | 6 hours | Times/Datsun Grand Prix | report |
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| 1984 | Randy Lanier Bill Whittington | Blue Thunder Racing | March 84G-Chevrolet | 6 hours | Times/Nissan Grand Prix | report |
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| 1985 | Pete Halsmer John Morton | BF Goodrich | Porsche 962 | 600 km (370 mi) | Times/Nissan Grand Prix of Endurance | report |
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| 1986 | Rob Dyson Price Cobb | Dyson Racing | Porsche 962 | 6 hours | Times/Ford Grand Prix | report |
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| 1987 | John Morton Hurley Haywood | Group 44 | Jaguar XJR-7 | 500 km (310 mi) | Los Angeles Times Grand Prix | report |
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