| 1 | Tristan ColaizziPlace 1 · G. Day School | — | G. Day School | 1:08.40 | 1 |
| 2 | Shareek BranchPlace 2 · Gonzaga | — | Gonzaga | 1:09.20 | 1 |
| 3 | Tre JonesPlace 3 · Gonzaga | — | Gonzaga | 1:11.30 | 1 |
| 4 | Max EstabrookPlace 4 · G. Day School | — | G. Day School | 1:14.40 | 3 |
| 5 | Ian WardPlace 5 · G. Day School | — | G. Day School | 1:15.20 | 1 |
| 6 | Hollis BluesteinPlace 6 · StStephenAgnes | — | StStephenAgnes | 1:15.40 | 4 |
| 6 | John SweeneyPlace 6 · StStephenAgnes | — | StStephenAgnes | 1:15.40 | 2 |
| 8 | Deandre WoodenPlace 8 · Flint Hill | — | Flint Hill | 1:15.70 | 3 |
| 9 | Toby RobinsonPlace 9 · Potomac | — | Potomac | 1:17.80 | 5 |
| 10 | Silas MorsinkPlace 10 · G. Day School | — | G. Day School | 1:17.90 | 3 |
| 10 | Mason EdwardsPlace 10 · StStephenAgnes | — | StStephenAgnes | 1:17.90 | 4 |
| 12 | Philip WrightPlace 12 · Sidwell | — | Sidwell | 1:18.10 | 9 |
| 13 | Justin FridayPlace 13 · G. Day School | — | G. Day School | 1:18.40 | 2 |
| 14 | Elliot KimPlace 14 · Potomac | — | Potomac | 1:19.90 | 6 |
| 15 | Thomas MajurePlace 15 · StStephenAgnes | — | StStephenAgnes | 1:20.20 | 6 |
| 16 | Ben FybelPlace 16 · Flint Hill | — | Flint Hill | 1:20.90 | 7 |
| 17 | Jinsoo KimPlace 17 · Episcopal | — | Episcopal | 1:21.40 | 5 |
| 18 | Graham TracyPlace 18 · StStephenAgnes | — | StStephenAgnes | 1:21.70 | 5 |
| 19 | Henry HohlsteinPlace 19 · Episcopal | — | Episcopal | 1:21.90 | 9 |
| 20 | Konrad McKalipPlace 20 · Potomac | — | Potomac | 1:23.40 | 4 |
| 21 | Matthew BerendsenPlace 21 · Episcopal | — | Episcopal | 1:23.60 | 6 |
| 22 | James DixonPlace 22 · Episcopal | — | Episcopal | 1:27.90 | 7 |
| 23 | Lebby ClementPlace 23 · Episcopal | — | Episcopal | 1:32.50 | 7 |
| 24 | Miles WilsonPlace 24 · Sidwell | — | Sidwell | 1:32.60 | 9 |
| 25 | Thomas MillsPlace 25 · Sidwell | — | Sidwell | 1:35.60 | 8 |
| 26 | George EberlePlace 26 · Episcopal | — | Episcopal | 1:36.40 | 7 |
| 27 | Matson SchorrPlace 27 · Episcopal | — | Episcopal | 1:38.10 | 8 |
| 28 | Geordie HendricksPlace 28 · Episcopal | — | Episcopal | 1:39.90 | 9 |
| 29 | Carson ArpPlace 29 · Episcopal | — | Episcopal | 1:42.10 | 8 |
| 30 | Dylan JenkinsPlace 30 · Flint Hill | — | Flint Hill | 1:50.20 | 8 |
