| Serie 1 |
| Antonio Cerda Brown | Cordillera | 4 | 11.59 | 1 q |
| Andrés Pino Ross | San Anselmo | 5 | 12.45 | 10 |
| Pedro Krebs Saez | San Ignacio El Bosque | 2 | 12.66 | 15 |
| Juan Pablo Piretta Pozzolo | San Benito | 3 | | |
| Noah Jacobsen A | Alemán de Santiago | 6 | | |
| Serie 2 |
| Benjamin Sepulveda Tighe | Padre Hurtado y Juanita de los Andes | 3 | 11.77 | 2 q |
| Borja Errazuriz Vergara | Cordillera | 2 | 11.91 | 4 q |
| Vicente Velasco Fernándes | Monte Tabor | 5 | 12.45 | 11 |
| Jaime Tagle Dufeu | San Benito | 4 | | |
| Serie 3 |
| Pedro Pablo Ovalle Ballacey | Padre Hurtado y Juanita de los Andes | 5 | 11.80 | 3 q |
| José Ignacio Chomali Castro | Everest | 2 | 12.34 | 8 |
| Giancarlo Castillo Puppo | The Mayflower School | 3 | 12.85 | 16 |
| Agustin Silva Donoso | Cordillera | 4 | | |
| Serie 4 |
| Bastian Goldner Ortega | Alemán de Santiago | 4 | 11.97 | 5 q |
| Sebastián Casas Cordero Etchepare | Everest | 5 | 13.10 | 18 |
| Santiago Valdez Ihnen | The Mayflower School | 2 | | |
| Raimundo Ovalle Ballacey | Padre Hurtado y Juanita de los Andes | 3 | | |
| Serie 5 |
| Martin Ruiz-Tagle Verdugo | San Ignacio El Bosque | 4 | 12.36 | 9 |
| Agustín José Chávez Zurita | Everest | 2 | 12.53 | 13 |
| Martín Chavez Osses | San Anselmo | 3 | 12.60 | 14 |
| Matías Schaub Riveaux | Alemán de Santiago | 5 | | |
| Serie 6 |
| Juan De Dios Reyes Saldivar | San Ignacio El Bosque | 6 | 12.06 | 6 q |
| Nicholas Davis Catafau | San Benito | 5 | 12.07 | 7 |
| Pablo Infante Cruz | Monte Tabor | 3 | 12.50 | 12 |
| Martin Palisson Leyenda | Monte Tabor | 2 | 12.88 | 17 |
| Renato Van De Wyngard Saldias | San Anselmo | 4 | | |
