Debutants
Alberto Contador is the youngest debutant in Vuelta Ciclista a La Rioja in 2003. There are 48 debutants.
| # | Rider | Team | Age |
|---|---|---|---|
| 1 | CONTADOR Alberto | O.N.C.E. - Eroski | 20y + 140d |
| 2 | LE MÉVEL Christophe | Crédit Agricole | 22y + 226d |
| 3 | DUMOULIN Samuel | Jean Delatour | 22y + 248d |
| 4 | DAVIS Allan | O.N.C.E. - Eroski | 22y + 272d |
| 5 | ELORRIAGA Unai | Labarca-2-Café Baqué | 22y + 307d |
| 6 | GUTIERREZ Francisco | Labarca-2-Café Baqué | 22y + 326d |
| 7 | PLAZA Rubén | iBanesto.com | 23y + 56d |
| 8 | HERVÉ Cédric | Crédit Agricole | 23y + 162d |
| 9 | GONZALEZ Javier Alberto | 05 Orbitel | 23y + 163d |
| 10 | EDALEINE Christophe | Jean Delatour | 23y + 175d |
| 11 | HERRERO David | Euskaltel - Euskadi | 23y + 189d |
| 12 | BUFFAZ Mickaël | Jean Delatour | 23y + 339d |
| 13 | DAY Benjamin | Carvalhelhos - Boavista | 24y + 135d |
| 14 | FÉDRIGO Pierrick | Crédit Agricole | 24y + 146d |
| 15 | PALACIOS Francisco | Labarca-2-Café Baqué | 24y + 152d |
| 16 | TOURNIER Yann | Crédit Agricole | 24y + 181d |
| 17 | GALPARSORO Dionisio | Euskaltel - Euskadi | 24y + 255d |
| 18 | MERCADO Juan Miguel | iBanesto.com | 24y + 291d |
| 19 | RODRIGUES José Carlos Silva | Carvalhelhos - Boavista | 24y + 295d |
| 20 | ZABALLA Constantino | Kelme - Costa Blanca | 24y + 345d |
| 21 | LEBLACHER Eric | Crédit Agricole | 25y + 35d |
| 22 | BELOKI Gorka | O.N.C.E. - Eroski | 25y + 53d |
| 23 | LAURENT Christophe | Jean Delatour | 25y + 273d |
| 24 | ISASI Iñaki | Euskaltel - Euskadi | 26y + 5d |
| 25 | SOUSA ALVES Célio Cristiano | Carvalhelhos - Boavista | 26y + 25d |
| 26 | FINOT Frédéric | Jean Delatour | 26y + 36d |
| 27 | KAGGESTAD Mads | Crédit Agricole | 26y + 62d |
| 28 | NAZON Jean-Patrick | Jean Delatour | 26y + 97d |
| 29 | USANO Julian | Kelme - Costa Blanca | 26y + 291d |
| 30 | MAESTRE José Manuel | Relax - Fuenlabrada | 26y + 296d |
| 31 | KUZNETSOV Alexei | Mix Antarte / Lokomotiv / ASC | 27y + 88d |
| 32 | PÉREZ Marlon Alirio | 05 Orbitel | 27y + 105d |
| 33 | SOEÍRO Pedro Miguel Miranda | Carvalhelhos - Boavista | 27y + 226d |
| 34 | BONILLA Hernan Dário | 05 Orbitel | 27y + 328d |
| 35 | REQUEJO Eligio | Mix Antarte / Lokomotiv / ASC | 28y + 72d |
| 36 | GARCÍA CALVO César | Labarca-2-Café Baqué | 28y + 122d |
| 37 | AUGÉ Stéphane | Crédit Agricole | 28y + 140d |
| 38 | GUILLAMÓN Juan Carlos | Paternina - Costa de Almería | 28y + 152d |
| 39 | MORIN Anthony | Crédit Agricole | 28y + 302d |
| 40 | CÁRDENAS Félix Rafael | 05 Orbitel | 30y + 152d |
| 41 | HERNÁNDEZ Jairo de Jesús | 05 Orbitel | 30y + 255d |
| 42 | LEFEVRE David | Jean Delatour | 30y + 361d |
| 43 | ODRIOZOLA Jon | iBanesto.com | 32y + 120d |
| 44 | SÁNCHEZ Domingo José | Paternina - Costa de Almería | 32y + 164d |
| 45 | SOURKOV Youri | Carvalhelhos - Boavista | 32y + 172d |
| 46 | ZAPATA Javier de Jesús | 05 Orbitel | 33y + 191d |
| 47 | THIBOUT Bruno | Jean Delatour | 33y + 352d |
| 48 | BUENAHORA Hernan | 05 Orbitel | 36y + 38d |