| Mark | Athlete | School | Year | Meet |
|---|
| 1:54.43 | Simon Douglas | Whitefish (A) | 12 | MCPS Invitational |
| 1:54.61 | Samuel Jagodzinski | Billings Central (A) | 12 | Midland Roundtable Top 10 |
| 1:54.65 | Evan Bennett | Hamilton (A) | 12 | Western A Divisional |
| 1:55.82 | Finn Schretenthaler | Park/Livingston (A) | 11 | Eastern A Divisional |
| 1:56.34 | Taylor Wanner | Custer Co./Miles City (A) | 12 | Sidney Twilight Meet |
| 1:57.63 | Jaden Silha | Dawson Co./Glendive (A) | 12 | Eastern A Divisional |
| 1:58.48 | Brayden Lanser | Hamilton (A) | 11 | Western A Divisional |
| 1:58.61 | Tayen Edmo | Ronan (A) | 12 | Western A Divisional |
| 1:58.67 | River Racine | Browning (A) | 11 | Western A Divisional |
| 1:59.36 | Ben Bird | Hardin (A) | 10 | Billings Central Invite |
| 1:59.67 | Jack Davidson | Corvallis (A) | 12 | Ravalli County Invitational |
| 1:59.68 | Taylor Doleac | Hamilton (A) | 11 | Western A Divisional |
| 1:59.86 | Jonah Njos | Custer Co./Miles City (A) | 11 | Sidney Twilight Meet |
| 2:00.02 | Preston McPherson | Whitefish (A) | 12 | Western A Divisional |
| 2:00.17 | Jacob Piapot | Ronan (A) | 12 | Western A Divisional |
| 2:00.28 | David DiGiallonardo | Polson (A) | 11 | MCPS Invitational |
| 2:00.64 | Noah Njos | Custer Co./Miles City (A) | 12 | Sidney Twilight Meet |
| 2:00.84 | Kayden Stewart | Hardin (A) | 11 | Eastern A Divisional |
| 2:01.24 | Sean Cotman | Bigfork (A) | 12 | Nelson-Thomas ABC Meet |
| 2:02.36 | Grey Piseno | Billings Central (A) | 11 | MC John Polich Invite |
| 2:02.98 | Austyn Jardine | Billings Central (A) | 11 | Eastern A Divisional |
| 2:03.17 | William Normandeau | Ronan (A) | | Lake County |
| 2:03.55 | Braden Anderson | Corvallis (A) | 9 | Nelson-Thomas ABC Meet |