| 11/23/1990 | | Interhigh Championship |
| 11/12/1990 | | Interhigh East-West Championship |
| 11/10/1990 | | MD XC State Championship |
| 11/10/1990 | | IAC Championship |
| 11/03/1990 | | ISL Championship |
| 11/01/1990 | | Metro and CGAA Championship |
| 11/01/1990 | | PVAC Championship |
| 11/01/1990 | | Class 3A Region II |
| 11/01/1990 | | Class 4A Region I |
| 11/01/1990 | | Class 4A Region II |
| 10/31/1990 | | MCPS Division Champions |
| 10/30/1990 | | St. Albans @ Georgetown Prep |
| 10/30/1990 | | Episcopal Quad |
| 10/29/1990 | | Metro Catholic Championship |
| 10/28/1990 | | Maryland Catholic Championship |
| 10/27/1990 | | ACC Championship |
| 10/26/1990 | | Montgomery Co. XC Championship |
| 10/23/1990 | | Sidwell Friends at DeMatha |
| 10/20/1990 | | Georgetown Prep Classic |
| 10/16/1990 | | Magruder, Gburg at Wheaton |
| 10/16/1990 | | Whitman, QO at PB |
| 10/16/1990 | | Churchill, Blair at Wootton |
| 10/16/1990 | | SV, Springbrook at WJ |
| 10/16/1990 | | Damascus, RM at Sherwood |
| 10/16/1990 | | Kennedy, B-CC at Einstein |
| 10/16/1990 | | Sidwell Friends at Bullis |
| 10/16/1990 | | Rockville at Watkins Mill |
| 10/15/1990 | | Spingarn Invitational |
| 10/09/1990 | | Sherwood at Rockville |
| 10/09/1990 | | Sidwell Friends at Landon |
| 10/09/1990 | | Springbrook at Churchill |
| 10/09/1990 | | SV, Wootton at Gburg |
| 10/09/1990 | | Magruder at Damascus |
| 10/09/1990 | | Wheaton, PB at JFK |
| 10/09/1990 | | Whitman at Einstein |
| 10/09/1990 | | QO at B-CC |
| 10/09/1990 | | WJ at Blair |
| 10/09/1990 | | Watkins Mill at RM |
| 10/07/1990 | | Jenny Rush Invitational |
| 10/06/1990 | | Salesianum Invitational |
| 10/02/1990 | | Churchill, Gaithersburg at WJ |
| 10/02/1990 | | Damascus at Rockville |
| 10/02/1990 | | Einstein, Wheaton at QO |
| 10/02/1990 | | Magruder, Sherwood at WM |
| 10/02/1990 | | RM, JFK at Whitman |
| 10/02/1990 | | Seneca Valley at Blair |
| 10/02/1990 | | Wootton at Springbrook |
| 09/25/1990 | | Watkins Mill at Damascus |
| 09/25/1990 | | WJ at Wootton |
| 09/25/1990 | | SF, Episcopal at GP |
| 09/25/1990 | | Blair, Gburg at Springbrook |
| 09/25/1990 | | Whitman, Wheaton at B-CC |
| 09/25/1990 | | RM, Rockville at Magruder |
| 09/25/1990 | | QO at Kennedy |
| 09/25/1990 | | PB, Sherwood at Einstein |
| 09/25/1990 | | Churchill at Seneca Valley |
| 09/17/1990 | | Woodward Relays |
| 09/15/1990 | | Spiked Shoe Invitational |
