| Place | Bib Num | Name | Affiliation | Time | Heat | Heat Place |
| 1 | F | StSte&StAgns | VA | 51.22 | 1 | 1 |
| 2 | K | Ireton | VA | 51.39 | 2 | 1 |
| 3 | A | Episcopal/Va | VA | 51.57 | 1 | 2 |
| 4 | G | Springside | PA | 52.44 | 1 | 3 |
| 5 | L | Brearley | NY | 52.49 | 2 | 2 |
| 6 | J | Army Prep | NJ | 53.38 | 2 | 3 |
| 7 | E | Qun Anne | MD | 54.03 | 1 | 4 |
| 8 | C | Hill School | PA | 55.44 | 1 | 5 |
| 9 | M | Collegiat/Va | VA | 55.99 | 2 | 4 |
| 10 | H | Westtown | PA | 56.13 | 2 | 5 |