2004 Le Mans Endurance Series
The 2004 Le Mans Endurance Series was the inaugural season of ACO's Le Mans Endurance Series. It is a series for Le Mans prototype and Grand Touring style cars broken into 4 classes: LMP1, LMP2, GTS, and GT. It began on 9 May 2004 and ended on 13 November 2004 after 4 rounds.
This season was preceded by the 1000km of Le Mans held in 2003 as a development race for the creation of the LMES.
Schedule
| Rnd | Race | Circuit | Date |
| - |  LMES Official Test | Paul Ricard HTTT | 10 April 11 April |
| 1 |  1000km of Monza | Autodromo Nazionale di Monza | 9 May |
| 2 |  1000km of Nürburgring | Nürburgring | 4 July |
| 3 |  1000km of Silverstone | Silverstone Circuit | 13 August |
| 4 |  1000km of Spa | Circuit de Spa-Francorchamps | 12 September |
Season results
Overall winner in bold.| Rnd | Circuit | LMP1 Winning Team | LMP2 Winning Team | GTS Winning Team | GT Winning Team | Results |
| Rnd | Circuit | LMP1 Winning Drivers | LMP2 Winning Drivers | GTS Winning Drivers | GT Winning Drivers | Results |
| 1 | Monza | #88 Audi Sport UK Veloqx | #99 PiR Compétition | #86 Larbre Compétition | #85 Freisinger Motorsport | Results |
| 1 | Monza | Johnny Herbert Jamie Davies | Marc Rostan Pierre Bruneau | Christophe Bouchut Pedro Lamy Steve Zacchia | Stéphane Ortelli Romain Dumas | Results |
| 2 | Nürburgring | #8 Audi Sport UK Veloqx | #13 Courage Compétition | #86 Larbre Compétition | #93 Cirtek Motorsport | Results |
| 2 | Nürburgring | Allan McNish Pierre Kaffer | Jean-Marc Gounon Alexander Frei Sam Hancock | Christophe Bouchut Pedro Lamy Steve Zacchia | Sascha Maassen Adam Jones | Results |
| 3 | Silverstone | #8 Audi Sport UK Veloqx | #13 Courage Compétition | #86 Larbre Compétition |  #70 JMB Racing | Results |
| 3 | Silverstone | Allan McNish Pierre Kaffer | Jean-Marc Gounon Alexander Frei Sam Hancock | Christophe Bouchut Pedro Lamy Steve Zacchia | Stéphane Daoudi Roman Rusinov | Results |
| 4 | Spa | #88 Audi Sport UK Veloqx | #13 Courage Compétition | #86 Larbre Compétition | #85 Freisinger Motorsport | Results |
| 4 | Spa | Johnny Herbert Jamie Davies | Jonathan Cochet Alexander Frei Sam Hancock | Christophe Bouchut Pedro Lamy Steve Zacchia | Stéphane Ortelli Emmanuel Collard | Results |