| Serie 1 |
| Olivia Pino Cave | Saint George's College | 2 | 11.32 | 2 q |
| Olivia Cisternas García-Huidobro | Santa Úrsula | 1 | 11.95 | 16 |
| Florencia Moyano Silva | Instituto Chacabuco | 3 | DNS | |
| Catalina Sabat Rodillo | San Benito | 5 | DNS | |
| Josefina Villena Soto | Lycée Antoine de Saint-Exupéry | 6 | DNS | |
| Serie 2 |
| Olivia Arteaga Figueroa | Saint George's College | 5 | 11.37 | 5 q |
| Isidora Verni Gimeno | SSCC Manquehue | 6 | 11.69 | 10 |
| Matilde Zegers Assler | San Benito | 1 | 12.32 | 20 |
| Laura Isabel Paredes Catalan | Melipilla | 4 | 12.41 | 21 |
| Trinidad Croquevielle Rendic | Los Andes | 2 | DNS | |
| Serie 3 |
| Maria Eugenia Prieto Mujica | Los Andes | 4 | 11.33 | 3 q |
| Josefina Stolzmann Von Unger | Huelén | 2 | 11.63 | 9 |
| María Jesús López Ruiz | La Maisonnette | 1 | 11.89 | 14 |
| Teresita Sweet Undurraga | San Benito | 3 | 11.93 | 15 |
| Valentina Alexandra Acevedo Ulloa | Melipilla | 5 | 12.80 | 24 |
| Antonia Vargas Vives | SSCC Manquehue | 6 | 14.66 | 25 |
| Serie 4 |
| Fatima Yarur Molina | Los Andes | 4 | 11.27 | 1 q |
| Maria De La Luz Zuñiga Errázuriz | Huelén | 1 | 11.36 | 4 q |
| Laura Wood Lewin | SSCC Manquehue | 3 | 11.40 | 7 |
| Catalina Corrada Simian | Lycée Antoine de Saint-Exupéry | 2 | 12.11 | 17 |
| Amalia Mendez Vergara | Santa Úrsula | 6 | 12.46 | 22 |
| Amanda Isidora Nuñez Caceres | Melipilla | 5 | 12.53 | 23 |
| Serie 5 |
| Florencia De La Sotta Garcia | Huelén | 6 | 11.39 | 6 q |
| Julieta Ponce Baeza | Instituto Chacabuco | 5 | 11.80 | 11 |
| Manuela Dussart Infante | Lycée Antoine de Saint-Exupéry | 2 | 11.84 | 12 |
| Clara Rodríguez Urzúa | Santa Úrsula | 4 | 11.85 | 13 |
| Jacinta García Montaner | Saint George's College | 3 | 12.19 | 18 |
| Serie 6 |
| Elisa Pérez Figueroa | La Maisonnette | 3 | 11.60 | 8 |
| Isabel Gonzalez Ruiz De Gamboa | La Maisonnette | 4 | 12.23 | 19 |
