| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Torres, Sofia R (13)
|
MRBAD |
17:52.93 |
17:53.32 |
0.39 |
| 2 |
Martorello, Gianna M (14)
|
MRWEST |
18:21.17 |
17:58.68 |
-22.49 |
| 3 |
Kang, Sunny (13)
|
MRWEST |
18:18.22 |
18:05.59 |
-12.63 |
| 4 |
Lent, Madeline J (14)
|
MRAGUA |
19:00.77 |
18:28.54 |
-32.23 |
| 5 |
White, Finley M (13)
|
MRBGNW |
|
19:25.21 |
- |
| 6 |
Lockwood, Bridget H (13)
|
MRAGUA |
19:45.77 |
19:38.32 |
-7.45 |
| 7 |
Gerosa, Grace H (14)
|
MRBGNW |
20:16.67 |
19:57.12 |
-19.55 |
| 8 |
O'Donnell, Katherine A (14)
|
MRBGNW |
20:00.82 |
20:10.27 |
9.45 |
| 9 |
Knox, Ella C (14)
|
MRAGUA |
19:45.77 |
20:11.09 |
25.32 |
| 10 |
McGourty, Megan R (13)
|
MRBGNW |
|
20:58.30 |
- |
| 11 |
Johnson, Evangeline N (13)
|
MRAGUA |
19:45.77 |
20:59.94 |
74.17 |
| 12 |
Lovig, Natalie J (13)
|
MRBGNW |
|
21:35.34 |
- |
|
Fishbein, Lauren B (14)
|
MRAGUA |
19:15.77 |
NS |
- |
|
Lin, Orly A (14)
|
MRAGUA |
19:45.77 |
NS |
- |