The Mountainbike Competition at the 2003 Pan American Games in Santo Domingo, Dominican Republic was held on 10 August 2003.
Results edit
Men's Cross Country edit
| Rank | Name | Time |
|---|---|---|
| 1 |  Jeremiah Bishop (USA) |
2:10.39 |
| 2 |  Edvandro Cruz (BRA) |
+ 0.14 |
| 3 |  Deiber Esquivel (CRC) |
+ 1.49 |
| 4 | Marcio Ravelli (BRA) |
+ 6.04 |
| 5 |  Fabio Castañeda (COL) |
+ 1 lap |
| 6 |  Yamil Carlos Montaño (BOL) |
+ 1 lap |
| 7 |  Edvin Barrios (GUA) |
+ 1 lap |
| 8 |  Ismael Sánchez (DOM) |
+ 1 lap |
| 9 |  Carlos Gennero (ARG) |
+ 1 lap |
| – | Héctor Paez (COL) |
DNF |
| – | José Adrián Bonilla (CRC) |
DNF |
| – | Jeremy Horgan (USA) |
DNF |
| – |  Ziranda Madrigal (MEX) |
DNF |
| – | Ramón Moronta (DOM) |
DNF |
| – |  Mathieu Toulouse (CAN) |
DNF |
Women's Cross Country edit
| Rank | Name | Time |
|---|---|---|
| 1 | Jimena Florit (ARG) |
2:02.59 |
| 2 | Mary McConneloug (USA) |
+ 2.50 |
| 3 |  Francisca Campos (CHI) |
+ 7.56 |
| 4 | Laura Morfín (MEX) |
+ 9.15 |
| 5 | Jacqueline Mourao (BRA) |
+ 1 lap |
| 6 | Karen Matamoros (CRC) |
+ 1 lap |
| 7 | Flor Delgadillo (COL) |
+ 1 lap |
| 8 |  María Ramírez (ECU) |
+ 1 lap |
| 9 | Anabella López (GUA) |
+ 1 lap |
| 10 | Diana Marggraff (ECU) |
+ 1 lap |