| Serie 1 |
| Pelayo Garcia Armas | San José de Chicureo | 4 | 11.22 | 3 q |
| Martin Castro Faret | Verbo Divino | 5 | 11.59 | 11 |
| Octavio Urrutia Moraga | Mayor - Peñalolen | 3 | 11.73 | 15 |
| Santiago Rodriguez Grass | Saint George's College | 1 | 11.91 | 17 |
| Martín Ignacio Alcaíno Moya | Sankt Thomas Morus | 6 | 11.98 | 19 |
| Santiago Ignacio Diaz Folsch | San Ignacio El Bosque | 7 | 12.50 | 25 |
| Maximiliano Bosler Quintas | San José de Chicureo | 2 | 13.13 | 32 |
| Francisco Ossorio Sottorff | Andree English School | 8 | 13.24 | 33 |
| Serie 2 |
| Martín Bozzo Amenábar | Verbo Divino | 4 | 11.18 | 2 q |
| Benjamín Mella Quezada | Tabancura | 3 | 11.59 | 12 |
| Uri Daile Bass | La Misión de Calera de Tango | 6 | 12.37 | 23 |
| Martin Alonso Alvarez | Pedro de Valdivia - Las Condes | 7 | 12.66 | 28 |
| Andrés Astorga Contreras | Saint Gabriel's School | 2 | 13.41 | 34 |
| Camilo Farías Negrón | Epullay Montessori | 8 | 13.73 | 37 |
| Cristobal Montero Dawabe | San Francisco de Asís | 1 | DNS | |
| Juan Vicente Rodriguez Flores | Padre Hurtado y Juanita de los Andes | 5 | DNS | |
| Serie 3 |
| Nicolas Daudet Escobar | San Ignacio El Bosque | 4 | 11.00 | 1 q |
| Diego Moreno Lecaros | Huinganal | 5 | 11.62 | 14 |
| Eduardo Matte Lama | Alemán de Santiago | 6 | 12.18 | 20 |
| José Cifuentes Morales | San Francisco de Asís | 1 | 12.25 | 21 |
| Angel Bernardo Barahona Peña | San Francisco de Asís - San Bernardo | 7 | 12.45 | 24 |
| Agustín Sariego Tápia | Saint Gabriel's School | 8 | 13.53 | 36 |
| Agustín Ignacio Figueroa Cárdenas | Saint George's College | 2 | DNS | |
| Manuel Marín Cousiño | Tabancura | 3 | DNS | |
| Serie 4 |
| Bruno Brufau A | Everest | 3 | 11.33 | 4 q |
| Cristian Montes A | The Grange School | 2 | 11.58 | 10 |
| Josef Peter Grohs De La Fuente | Alemán La Serena | 4 | 11.60 | 13 |
| Pedro Navarrete Correa | Everest | 5 | 11.88 | 16 |
| Felipe Andrade A | The Grange School | 1 | 12.52 | 26 |
| Carlos Urzua Aristia | Monte Tabor | 7 | 12.75 | 29 |
| Vicente Muñoz Silva | Instituto O'Higgins de Rancagua | 8 | 13.48 | 35 |
| Serie 5 |
| Diego Iacobelli Ovalle | Tabancura | 4 | 11.50 | 6 q |
| Maximo Correa Montero | Everest | 5 | 11.51 | 7 q |
| Domingo Matte Subercaseaux | Cordillera | 2 | 11.55 | 8 q |
| Martin Mondaca Fellenberg | San Ignacio El Bosque | 3 | 11.92 | 18 |
| José Tomás Bravo Rosa | Saint Gabriel's School | 7 | 13.00 | 30 |
| Diego Felipe Perez Ortiz | Internacional SEK | 8 | 13.03 | 31 |
| Martin Rosende Barros | Cordillera | 6 | DNS | q |
| Serie 6 |
| Domingo Cortinez Martinez | San José de Chicureo | 5 | 11.46 | 5 q |
| Manuel Cabezón Bascuñán | Verbo Divino | 4 | 11.56 | 9 |
| Diego De Juan Muñoz | Sankt Thomas Morus | 6 | 12.36 | 22 |
| Martín Saint-Anne Medina | Andree English School | 2 | 12.59 | 27 |
| Hector Burgos Sayes | Centro Educacional Aquelarre | 3 | DNS | |
| Martín Mackenna Vial | Maitenes | 7 | DNS | |
| Vicente Javier Aguzzi Arenas | Institución Teresiana | 8 | DNS | |
