Round 1
| Position | BIB | Name | Team | Echelon | Mark | 
|---|---|---|---|---|---|
| 1 | 216 | Isabel Laginhas |  AAG | SUB-16 | 19:45.74   | 
| 2 | 169 | Carolina Mendes |  ADAC | SUB-16 | 20:19.48   | 
| 3 | 399 | Juliana Vieira |  AAS | SUB-16 | 22:37.90 (>)   | 
| 4 | 448 | Vanessa Rosa |  ASAS | SUB-16 | 22:51.99 | 
| 5 | 24 | Kiara Young |  AALG | SUB-16 | 23:24.15 | 
| 6 | 155 | Mariana Fernandes |  AACB | SUB-16 | 24:35.66 | 
| 7 | 352 | Beatriz Esmeriz |  AAP | SUB-16 | 25:03.37 | 
| 8 | 278 | Luana Custódio |  AAL | SUB-16 | 25:30.92 | 
| 9 | 460 | Maria Ferreira |  ACORES | SUB-16 | 25:38.46 | 
| 10 | 540 | Leonor Costa |  AAV | SUB-16 | 25:44.11 | 
| 11 | 65 | Marta Costa |  AAA | SUB-16 | 26:06.37 | 
| 12 | 251 | Maria Vazão |  ADAL | SUB-16 | 26:18.34 | 
| 13 | 321 | Sara R. Fernandes |  AARAM | SUB-16 | 26:20.60 (>>> TR 54.7.3) | 
| 14 | 488 | Lara Cunha |  AAVC | SUB-16 | 27:52.61 (>) | 
| 15 | 125 | Maria Oliveira |  AAB | SUB-16 | 27:54.40 | 
| 16 | 88 | Madalena Calhau |  ABJ | SUB-16 | 28:17.31 |