| Place | Swimmer | Age | Club | Time | Std | Power pts |
|---|---|---|---|---|---|---|
| 1 | Michelle Weiss | 17 | SDPST | 18:44.13 | — | 608 |
| 1 | Charles Ashton | 13 | SDRST | 19:58.98 | B | 489 |
| 1 | Hailey Walter | 16 | WYGST | 20:16.23 | — | 480 |
| 1 | Nathan Ainslie | 15 | SDRST | 21:06.26 | B | 353 |
| 2 | Aaron Lansing | 14 | WYSST | 21:18.15 | — | 366 |
| 2 | Danielle Hintz | 15 | WYGST | 21:38.50 | B | 399 |
| 1 | Sorrinne Ekle | 14 | SDPST | 21:42.47 | B | 407 |
| 1 | Christian Ainslie | 17 | SDSSR | 22:04.05 | — | 294 |
| 2 | Marly Graham | 17 | WYSST | 22:10.70 | — | 367 |
| 1 | Abigail Anker | 12 | SDRST | 22:21.76 | B | 436 |
| 2 | William Hale | 16 | SDSSR | 22:40.60 | — | 272 |
| 3 | Brisa Snow | 15 | SDGOLD | 22:57.03 | — | 334 |
| 3 | Asher Renshaw | 13 | MTHOT | 25:15.79 | — | 242 |