| Serie 1 |
| Santiago Robeson Videla | Saint Gabriel's School | 4 | 12.22 | 6 q |
| Alberto Silva Davis | Trebulco School | 3 | 12.50 | 10 |
| Franco Santiago Rossi Santibáñez | Dunalastair - Chicureo | 6 | 12.83 | 21 |
| Ricardo Maximiliano Warnier Nakayama | Bradford School | 8 | 13.08 | 24 |
| Tomás Henríquez Alarcón | Dunalastair - Chicureo | 7 | 13.13 | 25 |
| Benjamín Alexis Sepúlveda Parra | The Wessex School - Concepción | 2 | 13.98 | 26 |
| Paul Maillet Elgueta | The Mayflower School | 5 | | |
| Serie 2 |
| Dante Goodman Reyes | Dunalastair - Peñalolén | 2 | 12.25 | 7 q |
| Jose Manuel Nuñez Alvear | The Mackay School | 3 | 12.50 | 11 |
| Yanglian Kong Araya | Dunalastair - Peñalolén | 7 | 12.71 | 15 |
| Marcelo Ambiado Rubilar | Saint Gabriel's School | 4 | 12.81 | 19 |
| Benjamín Gastón Saldías Hoffmann | Saint John's School - Concepción | 5 | DNS | |
| Agustin Mandiola Diaz | The Mayflower School | 6 | DNS | |
| Vicente Enrique Allue Lavin | Santiago College | 8 | DNS | |
| Serie 3 |
| Matias Fernandez De-Casacuberta | Redland School | 2 | 11.76 | 1 q |
| Felipe Perez Peters | Craighouse School | 6 | 11.95 | 4 q |
| Gonzalo Ceardi Rojas | The Mackay School | 3 | 12.39 | 9 |
| Miguel Garrido Urzua | Trebulco School | 4 | 12.80 | 18 |
| Lukas Vallejos Kohnenkamp | The Mayflower School | 5 | | |
| Matias Stierling Soulodre | Bradford School | 7 | | |
| Cristobal Porter Prado | Saint John's School - Concepción | 8 | | |
| Serie 4 |
| Viktor Bocic Molinari | Craighouse School | 6 | 11.85 | 2 q |
| Cristobal Baeza Torres | Saint John's School - Concepción | 3 | 12.19 | 5 q |
| Franco Solari Jander | The Mackay School | 4 | 12.68 | 14 |
| Clemente Jerez San Martín | Dunalastair - Chicureo | 5 | 12.73 | 16 |
| Martín Pérez Barrientos | Trebulco School | 8 | 12.82 | 20 |
| Martín Vicente Cabrales Tarbes | The Wessex School - Concepción | 7 | DNS | |
| Serie 5 |
| Nicolás Greiber Baraona | Craighouse School | 8 | 11.94 | 3 q |
| Hans Sebastian Eben Barros | Santiago College | 7 | 12.27 | 8 q |
| Yordy Delteil Reyes | Saint Gabriel's School | 5 | 12.54 | 12 |
| Felipe Jesus Toledo Ascorra | Santiago College | 2 | 12.56 | 13 |
| Joaquín José De La Jara Vergara | Dunalastair - Peñalolén | 4 | 12.75 | 17 |
| Emilio Jesús Zárate Fonseca | The Wessex School - Concepción | 6 | 12.92 | 22 |
| Matías Ignacio Burgueño Raffo | Bradford School | 3 | 12.94 | 23 |
