| Serie 1 |
| Humberto Peña Douglas | The Mayflower School | 3 | 11.91 | 5 q |
| Matías Silva Carrasco | Saint Gabriel's School | 5 | 11.96 | 7 q |
| Mauricio Alberto Montoya Vilches | Saint John's School - Concepción | 6 | 12.08 | 13 |
| Andrew Yorston Jeretic | Dunalastair - Las Condes | 7 | 12.10 | 14 |
| Lucas Rosas Parada | Orchard College | 4 | 12.40 | 19 |
| Benjamín Adriano Moreno Castillo | Dunalastair - Chicureo | 2 | 13.19 | 26 |
| Agustin Uribe Espinosa | Trebulco School | 1 | DNS | |
| Dante Saure Quinteros | Saint Gabriel's School | 5 | | |
| Serie 2 |
| Tomás Aparicio Vera | Dunalastair - Las Condes | 1 | 11.74 | 2 q |
| Franco De Aranzamendi Giannella | Santiago College | 7 | 11.88 | 4 q |
| Santiago De La Cuadra A | The Grange School | 2 | 11.95 | 6 q |
| Alex Meier Grandon | Saint Gabriel's School | 3 | 12.00 | 8 q |
| Lukas Fernando Díaz Valenzuela | The Mackay School | 6 | 12.17 | 16 |
| Daniel Lepeley Rubio | The Mayflower School | 4 | 12.90 | 23 |
| José Miguel Eyheramendy Reyes | Orchard College | 5 | 13.67 | 27 |
| Serie 3 |
| Thomas Clarke Lara | Craighouse School | 1 | 12.02 | 10 |
| Horacio Peña Braun | The Grange School | 2 | 12.28 | 18 |
| Lorenzo Andrés Espinoza Camaño | Dunalastair - Chicureo | 8 | 12.61 | 21 |
| Manuel José Gibson Undurraga | Orchard College | 7 | 12.91 | 24 |
| Joaquin Miguel Angel Gutierrez Bascuñan | The Wessex School - Concepción | 6 | 14.02 | 29 |
| Pedro Katz Meko | The Grange School | 2 | | |
| José María Torrealba Vasquez | Bradford School | 3 | DNS | |
| Raimundo Taladriz Stuardo | Santiago College | 4 | DNS | |
| Joaquin Stein Leonicio | Dunalastair - Las Condes | 5 | DNS | |
| Serie 4 |
| Franco Faundez Ferrini | Craighouse School | 6 | 12.02 | 11 |
| Andrés Subelman Neger | The Grange School | 1 | 12.16 | 15 |
| Diego Alfonso Ruiz Jara | Dunalastair - Peñalolén | 5 | 12.58 | 20 |
| Matías Vicente Riveros Ramorino | Dunalastair - Chicureo | 8 | 12.65 | 22 |
| Mauricio Ignacio Montecinos González | The Wessex School - Concepción | 2 | 13.74 | 28 |
| Lucas Moises Navarro Christoff | Bradford School | 3 | DNS | |
| Maximiliano Colvin Messenger | Santiago College | 4 | DNS | |
| Lucas Rivas Campos | Trebulco School | 7 | DNS | |
| Serie 5 |
| César De La Fuente López | Saint Gabriel's School | 3 | 11.73 | 1 q |
| Juan Agustín Barraza Simian | The Mackay School | 4 | 11.82 | 3 q |
| Sebastian Ignacio Valdes Silva | The Mackay School | 2 | 12.00 | 9 |
| Vicente García Loyola | Trebulco School | 6 | 12.03 | 12 |
| Santiago Cabargas Rengifo | Craighouse School | 5 | 12.26 | 17 |
| Pablo Martín Roa Ramírez | The Wessex School - Concepción | 1 | 12.93 | 25 |
| Rafale Zavala Correa | The Mackay School | 2 | | |
| Andrés Astorga Contreras | Saint Gabriel's School | 3 | | |
| Borja Matias Lavin Jaureguizar | Bradford School | 7 | DNS | |
