| Serie 1 |
| German Maldonado Rottmann | Trebulco School | 4 | 11.43 | 1 q |
| Vicente Urbina Calvanese | Santiago College | 6 | 11.74 | 5 q |
| Benjamín Hockley Nestler | Craighouse School | 2 | 11.86 | 8 q |
| Martín Piedrabuena Díaz | Bradford School | 3 | 12.27 | 14 |
| Giancarlo Castillo Puppo | The Mayflower School | 5 | 12.46 | 18 |
| Joaquín Alonso Cruces Koch | The Wessex School - Concepción | 7 | 12.58 | 21 |
| Nicolás Ignacio Nova Santibañez | The Wessex School - Concepción | 1 | 12.93 | 26 |
| Nicolás Dossetto González | Dunalastair - Peñalolén | 8 | | |
| Serie 2 |
| Matías Feres Aguado | Trebulco School | 4 | 11.57 | 2 q |
| José Tomás Rivas Figueroa | Craighouse School | 7 | 11.65 | 3 q |
| Cristóbal Lorenzo Vera Carrasco | The Wessex School - Concepción | 2 | 11.68 | 4 q |
| Juan Francisco Rossler Vergara | Bradford School | 6 | 11.92 | 10 |
| Gaspar Moltedo Fonzo | The Mackay School | 3 | 12.15 | 12 |
| Baltazar Jana Silva | Santiago College | 8 | 12.16 | 13 |
| Felipe Acevedo Cabeza | Santiago College | 1 | 12.72 | 22 |
| Joaquin Herrera Ducasse | The Mayflower School | 5 | 12.73 | 23 |
| Serie 3 |
| Tomas Pelen Pinochet | Saint Gabriel's School | 4 | 11.75 | 6 q |
| Martin Bezanilla Fernandez | The Mackay School | 2 | 11.85 | 7 q |
| Gerardo Sandoval Fernández | Saint Gabriel's School | 3 | 12.45 | 17 |
| Tomas Ignacio Matamala Silva | Trebulco School | 5 | 12.56 | 20 |
| Pablo Cortes Leighton | The Mayflower School | 7 | 12.98 | 27 |
| Enrrique Porter Prado | Saint John's School - Concepción | 6 | DNS | |
| Diego Muñoz Zamora | Craighouse School | 8 | DQ | |
| Serie 4 |
| Alonso Torres Carcamo | Dunalastair - Chicureo | 3 | 11.88 | 9 |
| Gabriel Bragar Hirmas | Bradford School | 6 | 12.14 | 11 |
| Agustin Pesce Soto | Saint John's School - Concepción | 4 | 12.34 | 15 |
| Martin Henrriquez Alarcon | Dunalastair - Chicureo | 2 | 12.35 | 16 |
| Mikel Lopez Arze | The Mackay School | 7 | 12.50 | 19 |
| Tomás Olate Martinez | Saint Gabriel's School | 8 | 12.75 | 24 |
| Enzo Oyarce Durbahn | Dunalastair - Chicureo | 5 | 12.82 | 25 |
