| | Age | Grade | Athlete | Time | ST | Team | Date | Meet |
| 1. | | 11 | Jack Hartsig | 16:21.7 | MD | Calvert | Oct 16
| Seahawk Invitational |
| 2. | | 11 | David Rodenhaver | 16:50.5PR | | Unattached | Nov 27
| NXR Southeast Regional Championships |
| 3. | | 11 | Aidan Lundberg | 17:24.5PR | | Unattached | Nov 27
| NXR Southeast Regional Championships |
| 4. | | 12 | Timothy Warren | 18:35.2PR | MD | Henry E. Lackey | Oct 20
| 2021 SMAC Cross Country Championship |
| 5. | | 12 | Brian Kauten | 18:37.9PR | MD | Calvert | Oct 16
| Seahawk Invitational |
| 6. | | 10 | David Bunting | 18:40.1PR | MD | Calvert | Oct 1
| Lehigh Paul Short Run |
| 7. | | 11 | Edwin Hall | 18:40.5PR | MD | Henry E. Lackey | Oct 20
| 2021 SMAC Cross Country Championship |
| 8. | | 11 | Nathan Collins | 18:55.7PR | MD | Calvert | Oct 16
| Seahawk Invitational |
| 9. | | 11 | Raymond Guzzone | 19:02.1 | MD | Henry E. Lackey | Oct 20
| 2021 SMAC Cross Country Championship |
| 10. | | 10 | London Wood | 19:04.1 | MD | Calvert | Oct 20
| 2021 SMAC Cross Country Championship |
| 11. | 14 | 9 | Carlos Williamson | 19:17.3 | MD | Calvert | Oct 16
| Seahawk Invitational |
| 12. | | 10 | James Westbrooks | 19:28.6PR | MD | Thomas Stone | Oct 20
| 2021 SMAC Cross Country Championship |
| 13. | | 11 | Ethan Serra | 19:28.9PR | MD | Patuxent | Oct 20
| 2021 SMAC Cross Country Championship |
| 14. | | 12 | Gavin Santerre | 19:36.1PR | MD | Calvert | Oct 1
| Lehigh Paul Short Run |
| 15. | | 12 | Ty Misiorek | 19:37.2PR | MD | Calvert | Oct 1
| Lehigh Paul Short Run |
| 16. | | 11 | Joseph Whitten | 19:38.8 | MD | MJ McDonough | Oct 20
| 2021 SMAC Cross Country Championship |
| 17. | | 10 | Shane Barber | 19:42.3 | MD | Henry E. Lackey | Oct 20
| 2021 SMAC Cross Country Championship |
| 18. | | 12 | Austin Ashley | 20:13.6PR | MD | La Plata | Oct 20
| 2021 SMAC Cross Country Championship |
| 19. | | 12 | Duncan Santerre | 20:25.3PR | MD | Calvert | Oct 1
| Lehigh Paul Short Run |
| 20. | | 11 | Griffin Fitzpatrick | 20:30.8PR | MD | La Plata | Oct 20
| 2021 SMAC Cross Country Championship |
| 21. | | 12 | Grant Winkler | 20:31.7 | MD | La Plata | Oct 20
| 2021 SMAC Cross Country Championship |
| 22. | | 12 | Elijah Ishmael | 20:43.6PR | MD | Henry E. Lackey | Oct 20
| 2021 SMAC Cross Country Championship |
| 23. | | 11 | Maciah Turner | 20:49.9 | MD | MJ McDonough | Oct 20
| 2021 SMAC Cross Country Championship |
| 24. | 15 | 9 | Mauricio Flores-Sor... | 20:55.8 | MD | Thomas Stone | Oct 20
| 2021 SMAC Cross Country Championship |
| 25. | | 12 | Toluwalase Adetosaf... | 21:00.7 | MD | Fairmont Heights | Sep 25
| Prince George's Invitational |
| 26. | | 12 | Nicholas Houchin | 21:08.8PR | MD | La Plata | Oct 20
| 2021 SMAC Cross Country Championship |
| 27. | | 10 | Thomas Cole | 21:10.2 | MD | Calvert | Oct 16
| Seahawk Invitational |
| 28. | | 11 | Joshua Sandifer | 21:30.5 | MD | Henry E. Lackey | Oct 20
| 2021 SMAC Cross Country Championship |
| 29. | | 9 | Elijah Carson | 21:55.0PR | MD | Calvert | Sep 11
| Oatlands Invitational |
| 30. | | 9 | Mason Furl | 22:10.6 | MD | Patuxent | Oct 20
| 2021 SMAC Cross Country Championship |
| 31. | | 10 | Daniel Gross | 22:12.2PR | MD | Henry E. Lackey | Oct 20
| 2021 SMAC Cross Country Championship |
| 32. | | 10 | Andrew Wroten | 22:13.9PR | MD | Patuxent | Oct 20
| 2021 SMAC Cross Country Championship |
| 33. | | 11 | James McRae | 22:18.8 | MD | MJ McDonough | Oct 20
| 2021 SMAC Cross Country Championship |
| 34. | | 12 | Nicholas Ross | 22:19.2 | MD | La Plata | Oct 20
| 2021 SMAC Cross Country Championship |
| 35. | | 10 | Corey Britton Jr | 22:30.1 | MD | Frederick Douglass-PG | Sep 25
| Prince George's Invitational |
| 36. | | 11 | Mitchell Gurney | 22:34.9PR | MD | MJ McDonough | Oct 20
| 2021 SMAC Cross Country Championship |
| 37. | 17 | 12 | Tyree Newman | 22:37.1PR | MD | Frederick Douglass-PG | Sep 25
| Prince George's Invitational |
| 38. | | 12 | Maddox Torres | 22:37.6 | MD | La Plata | Oct 20
| 2021 SMAC Cross Country Championship |
| 39. | | 11 | Gunner Gavin | 22:39.7 | MD | La Plata | Oct 20
| 2021 SMAC Cross Country Championship |
| 40. | | 12 | Evan Whitten | 22:40.1PR | MD | MJ McDonough | Oct 20
| 2021 SMAC Cross Country Championship |
| 41. | | 10 | David Yum | 22:42.1PR | MD | Westlake | Oct 20
| 2021 SMAC Cross Country Championship |
| 42. | | 12 | Benjamin Cottle | 22:43.5 | MD | La Plata | Oct 20
| 2021 SMAC Cross Country Championship |
| 43. | | 10 | Shane Settles | 22:44.5 | MD | Frederick Douglass-PG | Sep 25
| Prince George's Invitational |
| 44. | | 11 | Nolan Dement | 22:46.9 | MD | La Plata | Oct 20
| 2021 SMAC Cross Country Championship |
| 45. | | - | Ethan Reedy | 23:10.6PR | MD | Henry E. Lackey | Sep 22
| Calvert/Huntingtown @Lackey |
| 46. | | 10 | Noah Shaw | 23:16.6PR | MD | Westlake | Oct 20
| 2021 SMAC Cross Country Championship |
| 47. | | 12 | Paris Yates | 23:18.4PR | MD | La Plata | Oct 20
| 2021 SMAC Cross Country Championship |
| 48. | | 12 | Bryce Shannon | 23:28.1PR | MD | La Plata | Sep 22
| Chopticon, Great Mills, La Plata |
| 49. | | 12 | Alexander Fallin | 23:59.6PR | MD | La Plata | Sep 22
| Chopticon, Great Mills, La Plata |
| 50. | | 9 | Aaron Graves | 24:01.8 | MD | Henry E. Lackey | Oct 20
| 2021 SMAC Cross Country Championship |
| 51. | | 12 | Trotman Alimike | 24:09.6PR | MD | MJ McDonough | Oct 20
| 2021 SMAC Cross Country Championship |
| 52. | | 12 | Zyair De Gale | 24:10.1PR | MD | Thomas Stone | Oct 20
| 2021 SMAC Cross Country Championship |
| 53. | | 9 | Jaxon Ebert | 24:15.3PR | MD | Patuxent | Oct 20
| 2021 SMAC Cross Country Championship |
| 54. | | 9 | Trent Wagenbrenner | 24:23.9 | MD | MJ McDonough | Oct 20
| 2021 SMAC Cross Country Championship |
| 55. | | 11 | Todd Taylor | 24:32.1 | MD | La Plata | Sep 22
| Chopticon, Great Mills, La Plata |
| 56. | | 11 | Ryan Ward | 25:22.8PR | MD | Westlake | Sep 29
| Huntingtown/North Point/Westlake |
| 57. | | 12 | Raleigh Castleberry | 25:52.0PR | MD | La Plata | Sep 22
| Chopticon, Great Mills, La Plata |
| 58. | | 12 | Clinton Cupples | 25:55.2 | MD | La Plata | Sep 22
| Chopticon, Great Mills, La Plata |
| 59. | | 9 | Cannon Swanson | 25:59.4PR | MD | Calvert | Oct 16
| Seahawk Invitational |
| 60. | | 12 | Ryan Flake | 26:07.4 | MD | La Plata | Sep 22
| Chopticon, Great Mills, La Plata |
| 61. | | 12 | Michael Cheney | 26:31.4 | MD | La Plata | Sep 22
| Chopticon, Great Mills, La Plata |
| 62. | | - | Luke Deters | 27:43.8PR | MD | Henry E. Lackey | Sep 22
| Calvert/Huntingtown @Lackey |
| 63. | | 9 | Lavelton Jones | 27:49.7PR | MD | Thomas Stone | Oct 20
| 2021 SMAC Cross Country Championship |
| 64. | | 11 | Rider Russell | 28:29.4PR | MD | Calvert | Sep 22
| Calvert/Huntingtown @Lackey |
| 65. | | 11 | Kevin McCaffity | 29:03.5PR | MD | Patuxent | Oct 20
| 2021 SMAC Cross Country Championship |
| 66. | | 9 | Kenneth Green | 30:14.1PR | MD | Calvert | Sep 22
| Calvert/Huntingtown @Lackey |
| 67. | | - | Cristian Collins | 30:26.6PR | MD | Calvert | Sep 22
| Calvert/Huntingtown @Lackey |
| 68. | | 11 | Jamauri Bluford | 30:27.9 | MD | Westlake | Oct 20
| 2021 SMAC Cross Country Championship |
| 69. | | 9 | Evan Card | 30:40.0 | MD | Calvert | Sep 22
| Calvert/Huntingtown @Lackey |
| 70. | | 9 | Kenneth Bonolis | 37:08.0 | MD | Calvert | Sep 22
| Calvert/Huntingtown @Lackey |
| 71. | | 9 | Michael Grier | 37:37.7PR | MD | Thomas Stone | Oct 20
| 2021 SMAC Cross Country Championship |
| 72. | | 10 | Brad Gonzales | 40:52.1PR | MD | Westlake | Sep 29
| Huntingtown/North Point/Westlake |
| 73. | | 10 | Alex Gonzalez | 47:12.7PR | MD | Westlake | Sep 29
| Huntingtown/North Point/Westlake |