2005 Rolex Sports Car Series
The 2005 Rolex Sports Car Series season was the sixth season of the Rolex Sports Car Series run by the Grand American Road Racing Association. The format was reduced to two classes, Daytona Prototypes and Grand Touring. 14 races were run from February 5, 2005 to November 5, 2005. Laguna-Seca and Hermanos Rodríguez were added. It set the record for the longest Rolex season.
Schedule
† - The DP and GT classes ran separate, individual races at Phoenix.Results
Overall winners in bold.| Rnd | Circuit | DP Winning Teams | GT Winning Teams |
| Rnd | Circuit | DP Winning Drivers | GT Winning Drivers |
| 1 | Daytona |  #10 SunTrust Racing | #71 Farnbacher Racing USA |
| 1 | Daytona |  Max Angelelli Wayne Taylor Emmanuel Collard |  Wolf Henzler Dominik Farnbacher Pierre Ehret Shawn Price |
| 2 | Homestead | #10 SunTrust Racing | #65 Auto Gallery/TRG |
| 2 | Homestead | Max Angelelli Wayne Taylor | Marc Bunting Andy Lally |
| 3 | California | #01 CompUSA Chip Ganassi with Felix Sabates | #21 Prototype Technology Group |
| 3 | California |  Luis Diaz Scott Pruett | Bill Auberlen Joey Hand |
| 4 | Laguna Seca | #01 CompUSA Chip Ganassi with Felix Sabates | #16 Prototype Technology Group |
| 4 | Laguna Seca | Luis Diaz Scott Pruett | Bill Auberlen Tom Milner Justin Marks |
| 5 | Mont-Tremblant | #2 CITGO Howard-Boss Motorsports | #22 Prototype Technology Group |
| 5 | Mont-Tremblant |  Milka Duno Andy Wallace Jan Lammers | Ian James Joey Hand |
| 6 | Watkins Glen | #67 Krohn Racing/TRG | #14 Autometrics Motorsports |
| 6 | Watkins Glen | Tracy Krohn Niclas Jönsson | Wolf Henzler Leh Keen Cory Friedman |
| 7 | Daytona | #4 Howard-Boss Motorsports | #16 Prototype Technology Group |
| 7 | Daytona | Elliot Forbes-Robinson Butch Leitzinger | Bill Auberlen Justin Marks |
| 8 | Barber | #10 SunTrust Racing | #16 Prototype Technology Group |
| 8 | Barber | Max Angelelli Wayne Taylor | Bill Auberlen Justin Marks |
| 9 | Watkins Glen | #10 SunTrust Racing | #64 TRG |
| 9 | Watkins Glen | Max Angelelli Wayne Taylor | Paul Edwards Jan Magnussen |
| 10 | Mid-Ohio | #4 Howard-Boss Motorsports | #21 Prototype Technology Group |
| 10 | Mid-Ohio | Elliot Forbes-Robinson Butch Leitzinger | Kelly Collins Tom Milner |
| 11† | Phoenix | #66 Krohn Racing/TRG | #64 TRG |
| 11† | Phoenix | Jörg Bergmeister Christian Fittipaldi | Paul Edwards Jan Magnussen |
| 12 | Watkins Glen | #10 SunTrust Racing | #65 TRG |
| 12 | Watkins Glen | Max Angelelli Wayne Taylor | Marc Bunting Andy Lally |
| 13 | Virginia | #01 CompUSA Chip Ganassi with Felix Sabates | #21 Prototype Technology Group |
| 13 | Virginia | Luis Diaz Scott Pruett | Bill Auberlen Tom Milner |
| 14 | Mexico City | #19 Finlay Motorsports | #64 TRG |
| 14 | Mexico City | Michael McDowell Memo Gidley | Paul Edwards Jan Magnussen |
† - The DP and GT classes ran separate, individual races for DP and GT.