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, and the fourth season under the sponsorship of Rolex. It began on February 5 with the 24 Hours of Daytona, and ended on November 5 with the Mexico City 250.
The 2005 season saw another reduction of classes for the fourth year in a row with the supression of the Super Grand Sport (SGS) class after just one season. The format was thus reduced to two classes, Daytona Prototypes (DP) and Grand Touring (GT).
The schedule was expanded to 14 races with the addition of new events at Mazda Raceway Laguna Seca and the Autódromo Hermanos Rodríguez, for the series' first venture outside of the United States and Canada. Held in support of Champ Car's Gran Premio Telmex-Tecate, it held the season finale, which changed for the second year in a row.
As a result, the race at California Speedway was moved to April, and the Phoenix 250 to September, with this event being split into separate races for the DP and the GT classes. The second race at Homestead–Miami Speedway was discontinued after one year, and replaced by a third visit to Watkins Glen International, as a support event for the return of the Watkins Glen Indy Grand Prix.
† - The DP and GT classes ran separate, individual races at Phoenix.
Overall winners in bold.
† - The DP and GT classes ran separate, individual races for DP and GT.
Championship points are awarded in each class at the finish of each event. Points are awarded based on finishing positions in the race as shown in the chart below. [1]
| Position | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Points | 35 | 32 | 30 | 28 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
|
Italics - Fastest lap |
| Pos | Driver | Points |
|---|---|---|
| 1 | | 377 |
| 2 | | 376 |
| | ||
| 3 | | 359 |
| 4 | | 337 |
| 8 | | 333 |
| | ||
| 6 | | 323 |
| 7 | | 323 |
| 8 | | 321 |
| 9 | | 307 |
| | ||
| 10 | | 282 |