|  Year | 
 Date | 
 Drivers | 
 Team | 
 Car | 
 Distance/Duration | 
 Race Title | 
 Report | 
| IMSA GT Championship | 
|  1975 | 
 June 14 | 
   Hurley Haywood | 
   G.W. Dickinson | 
 Porsche Carrera | 
 100 miles (160 km) | 
 Labatt's Blue 5000 Weekend | 
 Report | 
| World Sports Car Championship | 
|  1976 | 
 Aug 22 | 
   Jackie Oliver | 
   Shadow | 
 Shadow DN4 Chevrolet | 
 200 miles (320 km) | 
 Player's 200 Weekend | 
 Report | 
|  1977 | 
 Aug 20 | 
   Ludwig Heimrath
   Paul Miller | 
   Heimrath Racing | 
 Porsche 934/5 | 
 6 hours | 
 Molson Diamond Can-Am Trans-Am Weekend | 
 Report | 
 1978 1979 | 
 Not held | 
| World Sportscar Championship & IMSA GT Championship | 
|  1980 | 
 Aug 17 | 
   John Fitzpatrick
   Brian Redman | 
   Dick Barbour Racing/Sachs USA | 
 Porsche 935 K3/80 | 
 6 hours | 
 Molson Canadian 1000 | 
 Report | 
|  1981 | 
 Aug 16 | 
   Harald Grohs
   Rolf Stommelen | 
   Andial Meister Racing | 
 Porsche 935 K3 | 
 6 hours | 
 Molson 1000 | 
 Report | 
| IMSA GT Championship | 
|  1982 | 
 Aug 15 | 
   John Paul, Jr.
   John Paul, Sr. | 
   JLP Racing | 
 Porsche 935 JLP-3 | 
 6 hours | 
 Labatt's 50 GT | 
 Report | 
|  1983 | 
 Aug 14 | 
   Bob Tullius
   Bill Adam | 
   Group 44 | 
 Jaguar XJR-5 | 
 6 hours | 
 Labatt's GT | 
 Report | 
| World Sportscar Championship | 
|  1984 | 
 Aug 5 | 
   Jacky Ickx
   Jochen Mass | 
   Rothmans Porsche | 
 Porsche 956 | 
 1,000 km (620 mi) | 
 Budweiser GT | 
 Report | 
|  1985 | 
 Aug 11 | 
   Hans-Joachim Stuck
   Derek Bell | 
   Rothmans Porsche | 
 Porsche 962C | 
 1,000 km (620 mi) | 
 Budweiser GT | 
 Report | 
 1986 1987 1988 | 
 Not held | 
| IMSA GT Championship | 
|  1989 | 
 June 25 | 
   Pete Halsmer | 
   Roush Racing | 
 Mercury Cougar XR-7 | 
 500 km (310 mi) (GTO/GTU/AC only) | 
 The Audi Quattro IMSA Weekend | 
 Report | 
|  1990 | 
 June 24 | 
   Steve Millen | 
   Cunningham Racing | 
 Nissan 300ZX | 
 300 km (190 mi) (GTO/GTU/AAC only) | 
 The Nissan Grand Prix | 
 Report | 
|  1991 | 
 May 20 | 
   Pete Halsmer | 
   Mazda Motorsports | 
 Mazda RX-7 | 
 300 km (190 mi) (GTO/GTU/AAC only) | 
 The Nissan Grand Prix | 
 Report | 
|  1992 | 
 May 18 | 
   Jeremy Dale | 
   Cunningham Racing | 
 Nissan 300ZX | 
 2 hours (GTS/GTO/GTU only) | 
 The Nissan Grand Prix | 
 Report | 
 1993 1994 | 
  Not held | 
|  1995 | 
 Aug 13 | 
   Andy Wallace     James Weaver | 
   Dyson Racing | 
 Riley & Scott Mk III-Ford | 
 3 Hours | 
 Chrysler Mosport 500 | 
 Report | 
|  1996 | 
 Aug 25 | 
   Butch Leitzinger     John Paul Jr. | 
   Dyson Racing | 
 Riley & Scott Mk III-Ford | 
 3 Hours | 
 Chrysler Mosport 500 | 
 Report | 
|  1997 | 
 Aug 31 | 
   Ron Fellows     Rob Morgan | 
   Central Arkansas Racing | 
 Ferrari 333 SP | 
 2 Hours | 
 Mosport Festival | 
 Report | 
|  1998 | 
 Aug 9 | 
   Butch Leitzinger     James Weaver | 
   Dyson Racing | 
 Riley & Scott Mk III-Ford | 
 2 hours, 45 minutes | 
 Mosport Festival | 
 Report | 
| American Le Mans Series | 
|  1999 | 
 June 27 | 
   Jan Magnussen     Johnny O'Connell | 
   Panoz Motor Sports | 
 Panoz LMP-1 Roadster-S | 
 2 hours, 45 minutes | 
 The Grand Prix at Mosport | 
 Report | 
|  2000 | 
 Aug 6 | 
   Rinaldo Capello     Allan McNish | 
   Audi Sport North America | 
 Audi R8 | 
 2 hours, 45 minutes | 
 The globemegawheels.com Grand Prix at Mosport | 
 Report | 
|  2001 | 
 Aug 19 | 
   Frank Biela     Emanuele Pirro | 
   Audi Sport North America | 
 Audi R8 | 
 2 hours, 45 minutes | 
 Gran Turismo 3 Grand Prix at Mosport | 
 Report | 
|  2002 | 
 Aug 18 | 
   Rinaldo Capello     Tom Kristensen | 
   Audi Sport North America | 
 Audi R8 | 
 2 hours, 45 minutes | 
 Grand Prix at Mosport sponsored by mail2web.com | 
 Report | 
|  2003 | 
 Aug 17 | 
   Frank Biela     Marco Werner | 
   Infineon Team Joest | 
 Audi R8 | 
 2 hours, 45 minutes | 
 The Toronto Grand Prix of Mosport | 
 Report | 
|  2004 | 
 Aug 8 | 
   Butch Leitzinger     James Weaver | 
   Dyson Racing | 
 MG-Lola EX257 | 
 2 hours, 45 minutes | 
 The Toronto Grand Prix of Mosport | 
 Report | 
|  2005 | 
 Sept 4 | 
   Butch Leitzinger     James Weaver | 
   Dyson Racing | 
 MG-Lola EX257 | 
 2 hours, 45 minutes | 
 Labour Day Weekend Grand Prix of Mosport | 
 Report | 
|  2006 | 
 Sept 3 | 
   Rinaldo Capello     Allan McNish | 
   Audi Sport North America | 
 Audi R10 TDI | 
 2 hours, 45 minutes | 
 Mobil 1 presents the Labour Day Weekend Grand Prix of Mosport | 
 Report | 
|  2007 | 
 Aug 26 | 
   Rinaldo Capello     Allan McNish | 
   Audi Sport North America | 
 Audi R10 TDI | 
 2 hours, 45 minutes | 
 Mobil 1 presents the Grand Prix of Mosport | 
 Report | 
|  2008 | 
 Aug 24 | 
   Lucas Luhr     Marco Werner | 
   Audi Sport North America | 
 Audi R10 TDI | 
 2 hours, 45 minutes | 
 Mobil 1 presents the Grand Prix of Mosport | 
 Report | 
|  2009 | 
 Aug 30 | 
   David Brabham     Scott Sharp | 
   Patrón Highcroft Racing | 
 Acura ARX-02a | 
 2 hours, 45 minutes | 
 Mobil 1 presents the Grand Prix of Mosport | 
 Report | 
|  2010 | 
 Aug 29 | 
   Romain Dumas     Klaus Graf | 
   Muscle Milk Team Cytosport | 
 Porsche RS Spyder Evo | 
 2 hours, 45 minutes | 
 Mobil 1 presents the Grand Prix of Mosport | 
 Report | 
|  2011 | 
 July 24 | 
   Klaus Graf     Lucas Luhr | 
   Muscle Milk Aston Martin Racing | 
 Lola-Aston Martin B08/62 | 
 2 hours, 45 minutes | 
 Mobil 1 presents the Grand Prix of Mosport | 
 Report | 
|  2012 | 
 July 22 | 
   Klaus Graf     Lucas Luhr | 
   Muscle Milk Pickett Racing | 
 HPD ARX-03a | 
 2 hours, 45 minutes | 
 Mobil 1 presents the Grand Prix of Mosport | 
 Report | 
|  2013 | 
 July 21 | 
   Klaus Graf  
  Lucas Luhr
  | 
   Muscle Milk Pickett Racing | 
 HPD ARX-03c | 
 2 hours, 45 minutes | 
 Mobil 1 SportsCar Grand Prix | 
 Report | 
| IMSA WeatherTech SportsCar Championship | 
|  2014 | 
 July 13 | 
   Olivier Pla     Gustavo Yacamán | 
   OAK Racing | 
 Morgan LMP2-Nissan | 
 2 hours, 45 minutes | 
 Mobil 1 SportsCar Grand Prix | 
 Report | 
|  2015 | 
 July 12 | 
   Jordan Taylor
   Ricky Taylor | 
   Wayne Taylor Racing | 
 Dallara Corvette DP | 
 2 hours, 40 minutes | 
 Mobil 1 SportsCar Grand Prix | 
 Report | 
|  2016 | 
 July 10 | 
 TBD | 
 TBD | 
 TBD | 
 TBA | 
 Mobil 1 SportsCar Grand Prix | 
 Report |