Debutants
Thomas Dekker is the youngest debutant in Boucles de la Mayenne in 2003. There are 19 debutants.
| # | Rider | Team | Age |
|---|---|---|---|
| 1 | DEKKER Thomas | Rabobank Continental Team | 18y + 286d |
| 2 | DARTUS Jérémy | Crédit Agricole Espoirs | 20y + 69d |
| 3 | GILING Bas | Rabobank Continental Team | 20y + 227d |
| 4 | VAN HUMMEL Kenny | Rabobank Continental Team | 20y + 262d |
| 5 | LEQUATRE Geoffroy | Crédit Agricole Espoirs | 21y + 354d |
| 6 | SMIT Dennis | Van Vliet - EBH - Gazelle | 22y + 121d |
| 7 | TEN DAM Laurens | Rabobank Continental Team | 22y + 218d |
| 8 | GERRANS Simon | Carvalhelhos - Boavista | 23y + 34d |
| 9 | VAN GROEZEN Jelle | Van Hemert Groep Cycling Team | 23y + 60d |
| 10 | MOURIS Jens | Rabobank Continental Team | 23y + 99d |
| 11 | GUTTINGER Sandro | Team Macandina - Kewa Rad - VC Gippingen | 23y + 252d |
| 12 | ROBIN Denis | Crédit Agricole Espoirs | 23y + 357d |
| 13 | LEUPP Reto | Team Macandina - Kewa Rad - VC Gippingen | 24y + 72d |
| 14 | STRAUSS Jorg | Team Macandina - Kewa Rad - VC Gippingen | 25y + 30d |
| 15 | MAZZOLENI Renzo | Team Macandina - Kewa Rad - VC Gippingen | 26y + 80d |
| 16 | SMINK Juliën | Bankgiroloterij | 26y + 124d |
| 17 | JEURISSEN Cees | Van Hemert Groep Cycling Team | 27y + 45d |
| 18 | CARLSSON Mattias | Team Ringerike | 28y + 79d |
| 19 | DAYUS Jonathan | Team Ringerike | 29y + 68d |