| Mark | Athlete | School | Year | Meet |
|---|
| 8:48.24 | Weston Brown | Sea Level Times () | 12 | Arcadia Invitational (CA) |
| 8:50.26 | Nathan Neil | Sea Level Times () | 11 | Arcadia Invitational (CA) |
| 9:11.76 | Weston Brown | Bozeman (AA) | 12 | State AA Championship |
| 9:12.62 | Nathan Neil | Bozeman (AA) | 11 | State AA Championship |
| 9:14.70 | Finneas Colescott | Sea Level Times () | 12 | Arcadia Invitational (CA) |
| 9:23.80 | Ryan Harrington | Great Falls (AA) | 11 | State AA Championship |
| 9:26.37 | Finneas Colescott | Missoula Hellgate (AA) | 12 | Archie Roe Invitational |
| 9:28.62 | Carson Steckelberg | Gallatin (Bozeman) (AA) | 12 | Eastern AA Divisional |
| 9:32.73 | Jaxon Straus | Billings West (AA) | 12 | State AA Championship |
| 9:37.83 | Kenyon Popiel | Bozeman (AA) | 12 | State AA Championship |
| 9:38.31 | Greyson Piseno | Billings Central (A) | 9 | Eastern A Divisional |
| 9:40.73 | Mason Moler | Billings West (AA) | 11 | State AA Championship |
| 9:44.51 | Oren Arthun | Manhattan Christian (C) | 11 | State C Championship |
| 9:45.27 | Quinn Newman | Missoula Sentinel (AA) | 11 | Western AA Divisional |
| 9:45.75 | Luke Mest | Jefferson/Boulder (B) | 11 | Russ Plicher Top 10 |
| 9:46.21 | Charlie Serafin | Park/Livingston (A) | 12 | Eastern A Divisional |
| 9:46.80 | Thomas Oylear | Powder River Co./Broadus (C) | 11 | State C Championship |
| 9:47.77 | Ben Bird | Hardin (A) | 9 | State A Championship |
| 9:48.22 | Caleb Tomac | Havre (A) | 11 | Norm Girard North/East Top 10 |
| 9:49.60 | Taylor Doleac | Hamilton (A) | 9 | State A Championship |
| 9:49.77 | Kyler Harris | Florence-Carlton (B) | 10 | KLH Memorial Invitational |
| 9:52.83 | Henry Sund | Helena (AA) | 10 | Western AA Divisional |
| 9:52.86 | Peyton Summers | Wolf Point (B) | 11 | Norm Girard North/East Top 10 |
| 9:53.71 | Scott Parke | Drummond (C) | 11 | KLH Memorial Invitational |
| 9:54.70 | Wilson Derry | Missoula Hellgate (AA) | 11 | Greg Rice City Meet |
| 9:54.74 | Tyler Inabnit | Missoula Sentinel (AA) | 10 | Russ Plicher Top 10 |
| 9:56.55 | John Spinti | Great Falls (AA) | 11 | Eastern AA Divisional |
| 9:57.03 | Elliot Stimpson | Helena (AA) | 10 | Western AA Divisional |
| 9:57.67 | Emerson Hamma | Great Falls CMR (AA) | 9 | Eastern AA Divisional |
| 9:58.26 | Evan Bennett | Hamilton (A) | 10 | Hamilton Triangular |
| 9:59.07 | Brody Romano | Helena Capital (AA) | 12 | Western AA Divisional |
| 9:59.12 | Dylan Hill | Helena (AA) | 9 | Western AA Divisional |
| 9:59.13 | Callum Coots | Missoula Sentinel (AA) | 12 | Western AA Divisional |
| 9:59.26 | Bauer Hollman | Flathead (AA) | 11 | Archie Roe Invitational |
| 9:59.76 | Finn Schretenthaler | Park/Livingston (A) | 9 | Eastern A Divisional |
| 9:59.83 | Kiedis MacFarlane | Gallatin (Bozeman) (AA) | 12 | State AA Championship |
| 10:01.77 | Owen Thiel | Glacier (AA) | 9 | Western AA Divisional |
| 10:01.88 | Wilson Schmidt | Belgrade (AA) | 9 | Skor DeKam Invite |
| 10:06.05 | Mason Genovese | Whitefish (A) | 11 | Archie Roe Invitational |
| 10:08.76 | Mekhi Ladson | Lockwood (A) | 9 | Eastern A Divisional |
| 10:09.75 | Ian Gentry | Bozeman (AA) | 11 | Midland Roundtable Top 10 |
| 10:10.28 | Kieran Anderson | Bozeman (AA) | 11 | Eastern AA Divisional |
| 10:11.73 | Carter Heggem | Sidney (A) | 9 | Eastern A Divisional |
| 10:12.80 | Axel Butler | Gallatin (Bozeman) (AA) | 9 | Midland Roundtable Top 10 |
| 10:12.94 | Keiran Boyle | Helena Capital (AA) | 12 | MCPS Invite |
| 10:13.39 | Bryon Fanning | Three Forks (B) | 11 | State B Championship |
| 10:14.70 | Beau Johnston | Three Forks (B) | 12 | Van Kuren Invite (WA) |
| 10:14.74 | Zoran LaFrombois | Three Forks (B) | 12 | State B Championship |
| 10:15.76 | Elias Vesbach | Columbus (B) | 11 | Gold Strike Invitational |
| 10:19.25 | Hayden Smith | Charlo (C) | | State C Championship |
| 10:22.56 | David Cox | Hobson-Moore-Judith Gap (C) | 10 | State C Championship |
| 10:23.19 | Clayton Jassen | Belt (C) | 11 | State C Championship |