Round 1
| Position | BIB | Name | Team | Echelon | Mark |
|---|---|---|---|---|---|
| 1 | 3434 | Maria Leonor Pedrosa |
CAP
|
SUB-18 | 01:06.63 |
| 2 | 3450 | Rita Moreira |
CAP
|
SUB-18 | 01:12.67 |
| 3 | 3533 | Ana Ferreira |
CDP
|
SUB-18 | 01:13.42 |
| 4 | 4272 | Raissa Baptista |
LAVRA
|
SUB-18 | 01:13.97 |
| 5 | 3519 | Lara Sobral |
CDCNAV
|
SUB-18 | 01:32.74 |
| DNF | 3263 | Mariana Reis |
ARLVG
|
SUB-18 | x |