| Serie 1 |
| Franco Badani Larrondo | Instituto Chacabuco | 1 | 12.28 | 3 q |
| Diego Illanes Zamorano | SSCC Manquehue | 2 | 12.37 | 5 q |
| Felipe Smith Subercaseaux | Tabancura | 5 | 12.54 | 6 q |
| Agustín Dominguez Valdés | San Benito | 6 | 12.66 | 8 |
| Antonio Llanos Justiniano | Saint George's College | 3 | 12.79 | 10 |
| Adolf Sebastian Wilmer Vasquez | Marista - Diego Echeverría | 4 | 14.19 | 13 |
| Serie 2 |
| Juan José García Ovalle | Tabancura | 3 | 11.87 | 1 q |
| Nicolas Oyanedel Hermosilla | SSCC Manquehue | 6 | 12.67 | 9 |
| Lucas Millán Ruiz-Tagle | Saint George's College | 5 | 13.88 | 12 |
| Cristóbal Izquierdo Dettwiler | San Benito | 1 | DNS | |
| Maximo Rodriguez Guerra | Instituto Chacabuco | 2 | DNS | |
| Bastian Emanuel Lizana Bolderini | Marista - Diego Echeverría | 4 | DNS | |
| Serie 3 |
| Tomás Arenas Kutz | Tabancura | 5 | 12.14 | 2 q |
| Cristóbal Hempel Rojas | San Benito | 1 | 12.29 | 4 q |
| Gaston Alonso Assef | SSCC Manquehue | 3 | 12.64 | 7 |
| Maicol Antonio Fernandez Galaz | Marista - Diego Echeverría | 6 | 13.80 | 11 |
| Andrés Salvatierra Freire | Lycée Antoine de Saint-Exupéry | 2 | 14.29 | 14 |
| Alonso Guzman Tondreau | Saint George's College | 4 | DNS | |
