| Serie 1 |
| Renato Fernandez Tobar | SSCC Alameda | 3 | 11.35 | 2 q |
| Martín Andres Villegas Montoya | Scuola Italiana - Vittorio Montiglio | 8 | 11.49 | 4 q |
| Vicente Vergara Correa | Verbo Divino | 1 | 11.75 | 6 q |
| Bruno Brufau A | Everest | 5 | 11.83 | 7 q |
| Vicente Parada Muñoz | Cordillera | 7 | 11.89 | 9 |
| Cristobal Muñoz Muñoz | Saint George's College | 4 | 12.01 | 12 |
| Diego Leisewitz Muñoz | Cumbres | 6 | 12.25 | 15 |
| Andres Antonio Astete Jaque | Marista - Diego Echeverría | 2 | 12.39 | 19 |
| Serie 2 |
| Vicente Leisewitz Muñoz | Cumbres | 2 | 11.34 | 1 q |
| Martín Bozzo Amenábar | Verbo Divino | 6 | 11.45 | 3 q |
| Enrique Bollmann Marinovic | Tabancura | 7 | 11.97 | 11 |
| Carlos Nicolas Dominguez Dominguez | Marista - Diego Echeverría | 4 | 12.26 | 16 |
| Vincenzo Andrés Tabarroni Stier | Santo Domingo | 3 | 12.47 | 20 |
| Serie 3 |
| Cristian Valenzuela Moreno | Huinganal | 1 | 11.85 | 8 q |
| Gabriel Patricio Rehbein Vander Stelt | Liceo Bicentenario de Ancud | 3 | 11.90 | 10 |
| Jose Tomas Quiroga Cortes | Tabancura | 7 | 12.17 | 13 |
| Maximiliano Adolfo Brito Puga | Andree English School | 6 | 12.35 | 18 |
| Cristóbal Palma Soto | San Francisco Javier de Huechuraba | 8 | 13.06 | 23 |
| Serie 4 |
| José Velasco González | Saint George's College | 8 | 11.55 | 5 q |
| Luciano Serey Ibañez | Liceo Nuestra Señora del Rosario de Linares | 1 | 12.18 | 14 |
| Rodrigo Ignacio Labranque Contreras | Andree English School | 7 | 12.27 | 17 |
| Rodrigo Hasenberg Ballivian | Huinganal | 5 | 12.57 | 21 |
| Vicente Russi Urrutia | San Francisco Javier de Huechuraba | 3 | 12.68 | 22 |
| Francisco Yousset Garrido Molina | San Nicolás Diacono - Colina | 2 | 13.16 | 24 |
