| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Ritchey, Pepperrell M (15)
|
MAPAAC |
17:58.12 |
18:38.31 |
40.19 |
| 2 |
Wetmore, Kay E (17)
|
MAPAAC |
18:25.12 |
19:23.63 |
58.51 |
| 3 |
Tewksbury, Madison O (13)
|
MAPAAC |
19:05.10 |
19:27.07 |
21.97 |
| 4 |
Lin, Simone (13)
|
MAPAAC |
|
19:28.62 |
- |
| 5 |
Traub, Celia B (12)
|
MAPAAC |
|
19:38.65 |
- |
| 6 |
Walls, Jillian Y (14)
|
MAPAAC |
20:32.04 |
19:40.90 |
-51.14 |
| 7 |
Chi, Maggie (14)
|
MAPAAC |
19:57.39 |
19:41.64 |
-15.75 |
| 8 |
Hosking, Sarah O (15)
|
MAKIDS |
20:50.70 |
20:02.45 |
-48.25 |
| 9 |
Prushinski, Alison C (17)
|
MAGSY |
21:16.75 |
20:04.26 |
-72.49 |
| 10 |
Ford, Garrity A (13)
|
MAPAAC |
|
21:38.13 |
- |
| 11 |
Wrobleski, Victoria (17)
|
MAGSY |
20:18.25 |
21:38.58 |
80.33 |
| 12 |
Thomas, Morgan C (16)
|
MAKIDS |
|
23:24.19 |
- |
| 13 |
Murphy, Taegan M (12)
|
MAKIDS |
|
25:04.86 |
- |