| Serie 1 |
| Guido Brufau Pierini | Everest | 3 | 11.10 | 2 q |
| Carlos Vergara Correa | Verbo Divino | 4 | 11.47 | 4 q |
| Tobias Rieschel Arratia | Sankt Thomas Morus | 8 | 11.80 | 13 |
| Matias Rivero Chamorro | Internacional SEK | 2 | 12.02 | 18 |
| Diego Gajardo Durand | San Ignacio El Bosque | 1 | 12.36 | 26 |
| Jose Tomás Jorquera Aspé | Monte Tabor | 5 | DNS | |
| Martin Alonso Medel Bustamante | Instituto Santa MarĂa - Chillán | 6 | DNS | |
| Duilio De Lapeyra Perez | Lycée Antoine de Saint-Exupéry | 7 | DNS | |
| Serie 2 |
| Juan JosĂ© GarcĂa Ovalle | Tabancura | 4 | 11.07 | 1 q |
| Alonso Tomás León Rojas | Academia de Humanidades | 7 | 11.61 | 8 q |
| Tomás Javier Rivera Céspedes | Instituto La Salle | 3 | 11.89 (11.8900) | 15 |
| Tomas Osorio Llenas | Internacional SEK | 1 | 12.20 | 22 |
| Juan Cuevas Domange | Monte Tabor | 5 | 12.23 | 24 |
| Vicente Agustin Zapata Del Pielago | Verbo Divino - Chicureo | 8 | 12.87 | 36 |
| Serie 3 |
| Tomás Arenas Kutz | Tabancura | 3 | 11.56 (11.5600) | 5 q |
| Braulio Constantino Gaete Arancibia | Instituto La Salle | 5 | 11.82 | 14 |
| Alonso Tomas Carrillo Zapata | La MisiĂłn de Calera de Tango | 7 | 12.63 | 30 |
| AgustĂn Ignacio Cárdenas Illesca | Verbo Divino - Chicureo | 2 | 12.89 | 37 |
| Serie 4 |
| Alexanders Antonio Herrera Araya | Marista - Nuestra Señora de Andacollo | 2 | 12.17 | 21 |
| Franco Alejandro Basaez Guerra | The Greenland School | 3 | 12.55 | 29 |
| Santiago Emilio Figueroa Fernandez | Scuola Italiana - Vittorio Montiglio | 4 | 12.72 | 32 |
| Clemente González Dois | La Misión de Calera de Tango | 1 | 13.00 | 39 |
| MatĂas Alamos Holtz | Alemán Chicureo | 6 | 13.12 | 42 |
| Javier Nathan Kreisberg | Instituto Hebreo | 7 | 16.54 | 44 |
| Serie 5 |
| Martin DĂaz Del Solar | De La Salle | 3 | 11.56 (11.5600) | 6 q |
| Agustin Cilfone Ezquerra | The Newland School | 7 | 11.65 | 9 |
| Joaquin Aspee Campos | Instituto Rafael AriztĂa | 1 | 11.89 (11.8900) | 16 |
| Juan Ignacio Colil González | Maitenes | 2 | 11.96 | 17 |
| Woolf Berry Lessage Simeon | Escuela Atlética Ganbaru | 8 | 12.04 | 19 |
| Agustin Vidal Palma | Instituto Hebreo | 5 | 12.33 | 25 |
| JoaquĂn Ignacio Regifo Larrain | Alemán Chicureo | 6 | 12.84 | 35 |
| Sei Hernandez Serizawa | Saint Gabriel's School | 4 | DNS | |
| Serie 6 |
| Benjamin Ignacio Ibarra Paiyamil | Adventista de Chile | 6 | 11.24 | 3 q |
| BenjamĂn Meiss Contreras | Alemán de Santiago | 5 | 11.66 | 10 |
| Humberto Peña Douglas | The Mayflower School | 2 | 11.75 | 11 |
| Francisco Silva Fernandez | Padre Hurtado | 1 | 12.06 | 20 |
| Santiago Bernardo Colil González | Maitenes | 7 | 12.47 | 27 |
| Sebastian Goreux Figueroa | San José de Chicureo | 3 | 12.79 | 33 |
| Gaspar Arévalo Acevedo | Saint Gabriel's School | 4 | 12.99 | 38 |
| Gaspar Velasco P | The Grange School | 8 | 13.02 | 40 |
| Serie 7 |
| Patrick Devilat Necochea | Santa Cruz - Chicureo | 8 | 11.60 | 7 q |
| JoaquĂn Carrasco Olivares | San Ignacio El Bosque | 2 | 11.76 | 12 |
| Emilio Detmer Coimbra | Everest | 4 | 12.21 | 23 |
| Daniel Lepeley Rubio | The Mayflower School | 5 | 12.50 | 28 |
| Gabriel Van Klaveren Herrmann | Alemán de Santiago | 7 | 12.70 | 31 |
| Diego Alonso Rojas Canales | Lincoln College San MartĂn | 1 | 12.80 | 34 |
| Andrés Salvatierra Freire | Lycée Antoine de Saint-Exupéry | 6 | 13.20 | 42 |
| Martin Alejandro Riveros Martinez | Liceo Salesiano Camilo OrtĂşzar Montt | 3 | 13.22 | 43 |
