| Date |
Overall Winner(s) |
Entrant |
Car |
Distance/Duration |
Race Title |
Report
|
| IMSA GT Championship
|
| 1976
|
 Jim Busby |
Busby Racing |
Porsche Carrera |
100 miles (160 km) |
Coca-Cola Bottler's Weekend |
report
|
| 1977
|
 David Hobbs |
McLaren North America |
BMW 320i Turbo |
100 miles (160 km) |
|
report
|
| 1978
|
David Hobbs |
McLaren North America |
BMW 320i |
100 miles (160 km) |
3rd Annual Camel GT Challenge |
report
|
| 1979
|
Peter Gregg |
Peter Gregg |
Porsche 935/78 |
100 miles (160 km) |
Sprite Grand Prix |
report
|
| 1980
|
John Fitzpatrick |
Dick Barbour Racing |
Porsche 935 K3/80 |
100 miles (160 km) |
Datsun's Golden State Challenge Grand Prix |
report
|
| 1981
|
 Klaus Ludwig |
Team Zakspeed-Roush |
Ford Mustang Turbo |
100 miles (160 km) |
Datsun Camel GT |
report
|
| 1982
|
Klaus Ludwig |
Team Zakspeed-Roush |
Ford Mustang Turbo |
100 miles (160 km) |
Sears Point Camel GT |
report
|
| 1983
|
Al Holbert
Jim Trueman |
Holbert Racing |
March 83G-Porsche |
3 hours |
Ford California Camel GT |
report
|
| 1984
|
Bill Whittington |
Blue Thunder Racing Team |
March 83G-Chevrolet |
100 miles (160 km) |
Ford California Camel GT |
report
|
| 1985
|
 Bob Wollek |
Bayside Disposal Racing |
Porsche 962 |
300 km (190 mi) |
Ford California Grand Prix |
report
|
| 1986
|
Rob Dyson
Price Cobb |
Dyson Racing |
Porsche 962 |
300 km (190 mi) |
Ford California Grand Prix |
report
|
| 1987
|
Jochen Mass |
Bayside Motorsports |
Porsche 962 |
300 km (190 mi) |
Ford California Grand Prix |
report
|
| 1988
|
 Geoff Brabham |
Electramotive Engineering |
Nissan GTP ZX-T |
300 km (190 mi) |
Lincoln-Mercury California Grand Prix |
report
|
| 1989
|
Geoff Brabham |
Electramotive Engineering |
Nissan GTP ZX-T |
300 km (190 mi) |
Lincoln-Mercury California Grand Prix |
report
|
| 1990
|
 Juan Manuel Fangio II |
All American Racers |
Eagle HF89-Toyota |
300 km (190 mi) |
California Camel Grand Prix |
report
|
| 1991-1994: Not held
|
| 1995
|
James Weaver |
Dyson Racing |
Riley & Scott Mk III-Ford |
1 hour, 45 minutes |
Apple Computer, Inc. presents the California Grand Prix |
report
|
| 1996
|
 Wayne Taylor
Scott Sharp |
Doyle Racing |
Riley & Scott Mk III-Oldsmobile |
3 hours |
Toshiba California Grand Prix |
report
|
| 1997
|
Andy Wallace
James Weaver |
Dyson Racing |
Riley & Scott Mk III-Ford |
2 hours |
California Grand Prix |
report
|
| 1998: Not held
|
| American Le Mans Series
|
| 1999
|
 JJ Lehto
Steve Soper |
BMW Motorsport |
BMW V12 LMR |
2 hours, 45 minutes |
Grand Prix of Sonoma presented by Toshiba |
report
|
| 2000
|
Allan McNish
 Rinaldo Capello |
Audi Sport North America |
Audi R8 |
2 hours, 45 minutes |
Grand Prix of Sonoma |
report
|
| 2001
|
Rinaldo Capello
 Tom Kristensen |
Audi Sport North America |
Audi R8 |
2 hours, 45 minutes |
X-Factor Grand Prix of Sonoma |
report
|
| 2002
|
David Brabham
Jan Magnussen |
Panoz Motor Sports |
Panoz LMP 01 |
2 hours, 45 minutes |
Grand Prix of Sonoma presented by Foster's Lager |
report
|
| 2003
|
Butch Leitzinger
James Weaver |
Dyson Racing |
Lola EX257-AER |
2 hours, 45 minutes |
Infineon Grand Prix of Sonoma |
report
|
| 2004
|
JJ Lehto
Marco Werner |
ADT Champion Racing |
Audi R8 |
2 hours, 45 minutes |
Infineon Grand Prix of Sonoma |
report
|
| 2005
|
Frank Biela
Emanuele Pirro |
ADT Champion Racing |
Audi R8 |
2 hours, 45 minutes |
Infineon Grand Prix of Sonoma |
report
|
| Rolex Sports Car Series
|
| 2006
|
Scott Pruett
 Luis Díaz |
Chip Ganassi Racing with Felix Sabates |
Riley Mk XI-Lexus |
400 km (250 mi) |
|
report
|
| 2007*
|
Jon Fogarty
Alex Gurney |
GAINSCO/Bob Stallings Racing |
Riley Mk XI-Pontiac |
400 km (250 mi) |
Armed Forces Grand-Am 250 |
report
|
| 2008*
|
Max Angelelli
 Michael Valiante |
SunTrust Racing |
Dallara DP01-Pontiac |
250 miles (400 km) |
Armed Forces 250 |
report
|
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