| Atleta | Colegio | Pista | Resultado | Lugar |
|---|---|---|---|---|
| Serie 1 | ||||
| Patricio Busquet Llona | San Benito | 2 | 12.14 | 3 q |
| Gaspar Alonso Navarro Moreno | San Ignacio El Bosque | 4 | 12.22 | 6 q |
| Domingo Rios Barros | San Anselmo | 1 | 12.32 | 7 |
| Eduardo Fernandez Fernandez | SSCC Manquehue | 5 | 12.63 | 8 |
| Carlos Kinast Montes | Everest | 3 | 12.98 | 10 |
| Serie 2 | ||||
| Andrés Fernández Valdés | San Benito | 6 | 11.80 | 1 q |
| Lucca Paolo Davagnino Loguercio | San Ignacio El Bosque | 1 | 11.99 | 2 q |
| Tomas Lorca Lewin | SSCC Manquehue | 2 | 12.15 | 4 q |
| Ismael Felipe Browne Salinas | Monte Tabor | 3 | 12.20 | 5 q |
| Alfonso Enrique Plandiura Navarrete | Padre Hurtado | 5 | 12.90 | 9 |
| Diego Bazan Silva | SSCC Manquehue | 4 | 13.03 | 11 |
