| Atleta | Colegio | Pista | Resultado | Lugar |
|---|---|---|---|---|
| Serie 1 | ||||
| Lucas Badilla Zambrano | Mayor - Peñalolen | 4 | 12.03 | 2 q |
| Felipe Alvarez Silva | Mayor - Peñalolen | 6 | 12.28 | 3 q |
| Sebastian Cordero Otero | Atlético Francés | 3 | 12.69 | 7 q |
| Cristobal Arevalo Fuentes | Mayor - Peñalolen | 1 | 13.04 | 8 q |
| Andrés Jorquera Santelices | Atlético Manuel Larraín | 8 | 13.17 | 9 |
| Franco Cazenave Sandoval | Estadio Mayor | 2 | DNS | |
| Benjamín Lasen Strauss | Instituto Hebreo | 5 | DNS | |
| Gaston Camilo Puig Alvarez | The Angel's School | 7 | DNS | |
| Serie 2 | ||||
| Vicente Antonio Farias Correa | Atlético Manuel Larraín | 4 | 11.76 | 1 q |
| Diego Orellana Varela | Mayor - Peñalolen | 5 | 12.56 | 4 q |
| Mateo Cox Riveros | Universidad Católica | 6 | 12.58 | 5 q |
| Gaspar Mateo Obreque Castañeda | Manquehue | 1 | 12.63 | 6 q |
| Benjamin Pizarro Vivanco | Estadio Mayor | 8 | 13.36 | 10 |
| Eduardo Alfonso Vera Castillo | Manquecura - Ciudad de los Valles | 2 | 13.38 | 11 |
| Matias Alvarado Giglio | Mayor - Peñalolen | 3 | 14.30 | 12 |
| Gabriel Martinez Carramiñana | Instituto Hebreo | 7 | DNS | |
