| 1 | Sebring | 3/19/04 | Sebring International Raceway | 1 | 1 |
| 2 | Mid-Ohio | 6/26/04 | Mid-Ohio Sports Car Course | 2 | 3 |
| 3 | Lime Rock | 7/3/04 | Lime Rock Park | 3 | 2 |
| 4 | Infineon Raceway | 7/17/04 | Sonoma Raceway | 7 | 3 |
| 5 | Portland | 7/24/04 | Portland International Raceway | 3 | 2 |
| 6 | Mosport | 8/7/04 | Canadian Tire Motorsport Park | 2 | 2 |
| 7 | Road America | 8/21/04 | Road America | 1 | 3 |
| 8 | Road Atlanta | 9/24/04 | Road Atlanta | 3 | 31R |
| 9 | Phoenix | 10/2/04 | Phoenix International Raceway | 3 | 3 |
| 10 | Mazda Raceway Laguna Seca | 10/16/04 | Laguna Seca Raceway | 10 | 5 |