| Date: | April–September 2005 |
| Previous: | 2004 |
| Next: | 2006 |
The 2005 UCI Mountain Bike World Cup included four disciplines: marathon, cross-country, downhill and 4-cross.
| Date | width=20% align="center" | Venue | width=29% align="center" | Winner (Men) | width=29% align="center" | Winner (Women) |
| 24 April 2005 | Marie-Hélène Prémont | |||||
| 8 May 2005 | Gunn-Rita Dahle | |||||
| 29 May 2005 | Gunn-Rita Dahle | |||||
| 4 June 2005 | Gunn-Rita Dahle | |||||
| 25 June 2005 | Marie-Hélène Prémont | |||||
| 3 July 2005 | Gunn-Rita Dahle | |||||
| 9 July 2005 | Gunn-Rita Dahle | |||||
| 10 September 2005 | Gunn-Rita Dahle | |||||
| Final Standings | UCI World Cup Cross Country Championship | Christoph Sauser | Gunn-Rita Dahle | |||
| José Antonio Hermida | Sabine Spitz | |||||
| Julien Absalon | Marie-Hélène Prémont | |||||
| Date | width=20% align="center" | Venue | width=29% align="center" | Winner (Men) | width=29% align="center" | Winner (Women) |
| 30 April 2005 | Sabrina Jonnier | |||||
| 5 June 2005 | Anne-Caroline Chausson | |||||
| 12 June 2005 | Anne-Caroline Chausson | |||||
| 26 June 2005 | Tracy Mosely | |||||
| 3 July 2005 | Tracy Mosely | |||||
| 10 July 2005 | Sabrina Jonnier | |||||
| 21 August 2005 | Anne-Caroline Chausson | |||||
| 11 September 2005 | Tracy Mosely | |||||
| Final Standings | UCI World Cup Downhill Championship | Greg Minnaar | ||||
| Date | width=20% align="center" | Venue | width=29% align="center" | Winner (Men) | width=29% align="center" | Winner (Women) |
| 10 April 2005 | Petra Henzi | |||||
| 1 May 2005 | ||||||
| 18 June 2005 | Jaqueline Mourão | |||||
| 10 July 2005 | Anna Enocsson | |||||
| 7 August 2005 | Esther Suess | |||||
| 13 August 2005 | Anna Enocsson | |||||
| 1 October 2005 | ||||||
| 14 October 2005 | Alison Sydor | |||||
| Final Standings | UCI World Cup Marathon Championship | |||||
| Date | width=20% align="center" | Venue | width=29% align="center" | Winner (Men) | width=29% align="center" | Winner (Women) |
| 1 May 2005 | Jill Kintner | |||||
| 5 June 2005 | cancelled | Anneke Beerten | ||||
| 11 June 2005 | Anneke Beerten | |||||
| 25 June 2005 | Jill Kintner | |||||
| 4 July 2005 | Jill Kintner | |||||
| 9 July 2005 | Jill Kintner | |||||
| 21 August 2005 | Jill Kintner | |||||
| 10 September 2005 | Jill Kintner | |||||
| Final Standings | UCI World Cup Four-Cross Championship | |||||