| Serie 1 |
| Jose Agustin Irarrazaval Mainguyague | Tabancura | 5 | 11.29 | 2 q |
| Domingo Ortuzar Bernales | San Anselmo | 7 | 11.42 | 5 q |
| Diego Ivan Leyton Escauriaza | Institución Teresiana | 2 | 11.87 | 13 |
| Gabriel Fuentes Cerda | Sankt Thomas Morus | 6 | 12.51 | 26 |
| Francisco Letelier Morande | Verbo Divino | 3 | 12.72 | 27 |
| Camilo Cardona Tapias | SSCC Manquehue | 4 | | |
| Lucas Cristobal Bahamonde Alvarado | Alianza Francesa de Valparaiso | 8 | | |
| Serie 2 |
| Leon Clemente Walker Depassier | SSCC Manquehue | 8 | 11.41 | 4 q |
| Santiago Vial Ruiz Tagle | Tabancura | 5 | 11.49 | 7 q |
| José Ignacio Piffaut Urzúa | San Anselmo | 3 | 11.68 | 9 |
| Martín Araya Muñoz | Instituto América - Maipú | 4 | 11.84 | 12 |
| Pablo Infante Cruz | Monte Tabor | 6 | 11.96 | 18 |
| Joaquín Valenzuela González | Cumbres | 7 | 12.25 | 23 |
| Gerónimo Prado Pizarro | Huelquén | 2 | | |
| Serie 3 |
| Borja Errazuriz Vergara | Cordillera | 3 | 11.67 | 8 q |
| José Ignacio Chomali Castro | Everest | 4 | 11.94 | 16 |
| Ian Keller Gomez | Alemán de Santiago | 8 | 11.95 | 17 |
| Paul Little Soza | Cumbres | 2 | 12.11 | 19 |
| Matias Segovia Rubio | Padre Hurtado y Juanita de los Andes | 5 | 12.11 | 20 |
| Diego Pezzani Castro | San José de Chicureo | 7 | 12.50 | 25 |
| Víctor José Regimio Moreno Angulo | De Santa María - El Monte | 6 | | |
| Serie 4 |
| Martín Sáenz De Santa María Jarry | Everest | 3 | 11.28 | 1 q |
| Tomás Irarrázaval Varela | Cumbres | 4 | 11.33 | 3 q |
| Agustin Silva Donoso | Cordillera | 7 | 11.72 | 10 |
| Bastian Goldner Ortega | Alemán de Santiago | 6 | 11.91 | 14 |
| Jose Ignacio Casasempere Yancovic | Padre Hurtado y Juanita de los Andes | 2 | | |
| Daniel Ignacio Klenner Aguilera | Instituto San Martín - Curicó | 5 | | |
| Matías Esteban Alfaro Méndez | The English Institute | 8 | | |
| Serie 5 |
| Felipe Andrés Rojas Kowoll | Alemán de Santiago | 4 | 11.93 | 15 |
| Ilan San Martin Kleinkopf | Instituto Hebreo | 5 | 12.23 | 22 |
| Agustín José Chávez Zurita | Everest | 8 | 12.35 | 24 |
| Antonio Valenzuela Rodriguez | San Ignacio El Bosque | 2 | | |
| German Maldonado Rottmann | Trebulco School | 3 | | |
| Vicente Ignacio Rojas Murúa | The English Institute | 6 | | |
| Andrés Felipe Cruz Gaviria | Calasanz | 7 | | |
| Serie 6 |
| Andres Paul Rios | Tabancura | 4 | 11.45 | 6 q |
| Joaquin Alcaino Velasquez | SSCC Alameda | 2 | 11.74 | 11 |
| Victor Daniel Cortes Arriagada | Institución Teresiana | 6 | 12.14 | 21 |
| Juan José Barrientos Duhalde | Calasanz | 8 | 12.68 | |
| Claudio Varas A | San Anselmo | 3 | | |
| Jose Ignacio Ramirez Bresciani | SSCC Manquehue | 5 | | |
| Nicolas Serrano Bittazzoni | Verbo Divino | 7 | | |
