| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Hahn, Lily (12)
|
MARAD |
1:02.92 |
1:06.64 |
3.72 |
| 2 |
Grimley, Taylor O (12)
|
MARAD |
1:06.05 |
1:07.98 |
1.93 |
| 3 |
Bevenour, Holly E (12)
|
MARAD |
1:06.94 |
1:10.53 |
3.59 |
| 4 |
Coonley, Campbell P (12)
|
MARAD |
1:26.86 |
1:10.73 |
-16.13 |
| 5 |
Cella, Olivia (12)
|
MARAD |
1:09.78 |
1:13.53 |
3.75 |
| 6 |
Heimowitz, Miranda J (12)
|
MAGSA |
|
1:16.15 |
- |
| 7 |
Bloomfield, Gianna G (12)
|
MARAD |
1:15.09 |
1:16.27 |
1.18 |
| 8 |
Mlodzienski, Sophia M (12)
|
MARAD |
1:22.55 |
1:17.05 |
-5.50 |
| 9 |
O'Neill, Eleanor G (12)
|
MARAD |
1:17.44 |
1:18.90 |
1.46 |
| 10 |
Copas, Savina (12)
|
MARAD |
1:19.69 |
1:20.48 |
0.79 |
| 11 |
Garrabrant, Megan S (11)
|
MAGSA |
1:26.09 |
1:22.74 |
-3.35 |
| 12 |
Tancini, Elyse C (12)
|
MAPVAC |
1:30.36 |
1:25.70 |
-4.66 |
| 13 |
Wittmer, Sarah A (11)
|
MAGSA |
1:28.90 |
1:28.75 |
-0.15 |
|
McKeown, Sienna M (11)
|
MATRI |
|
DQ |
- |