| 2021 Tri-Valley Mustang Football Varsity Schedule --- Regular Season Record: 5-4 Overall Record: 5-5 Total Points For: 150 Average Points For: 15.0 Total Points Against: 187 Average Points Against: 18.7 |
| Date | Opponent | Location | Time | Result |
| August 27 | Dakota Valley Panthers | Dakota Valley | 7:00pm | W--21-20 |
| September 3 | Canton C-Hawks | Tri-Valley | 7:00pm | L--16-21 |
| September 10 | Sioux Falls Christian Chargers | Tri-Valley | 7:00pm | L--0-15 |
| September 17 | Chamberlain Cubs | Chamberlain | 7:00pm | W--18-0 |
| September 24 | Sisseton Redmen | Sisseton | 7:00pm | W--42-0 |
| October 1 | Madison Bulldogs | Tri-Valley | 7:00pm | L--0-40 |
| October 9 | Lennox Orioles | Lennox | 5:00pm | W--20-14 |
| October 15 | Vermillion Tanagers | Vermillion | 7:00pm | W--20-13 |
| October 21 | Dell Rapids Quarriers | Tri-Valley | 7:00pm | L--6-43 |
| October 28 | 11A Playoffs--Quarterfinals Vermillion Tanagers |
Vermillion | 7:00pm | L--7-21 |
| November 5 | 11A Playoffs--Semifinals | TBD | TBD | |
| November 11-13 | 11A Championship | Vermillion | TBD |
| 2021 Tri-Valley Mustang Football Junior Varsity Schedule --- Record: 2-3 |
| Date | Opponent | Location | Time | Result |
| August 30 | Dakota Valley Panthers | Dakota Valley | 4:00 | L--13-14 |
| September 6 | Canton C-Hawks | Tri-Valley | 4:00 | L--0-36 |
| September 13 | Sioux Falls Christian Chargers | Tri-Valley | 4:00 | Called--Lightning |
| September 20 | Open | --- | --- | --- |
| September 27 | Tea Area Titans | Tea | 4:00 | L--0-20 |
| October 4 | Madison Bulldogs | Tri-Valley | 4:00 | W--21-6 |
| October 11 | Lennox Orioles | Lennox | 4:00 | W--20-8 |
| 2021 Tri-Valley Mustang Football C-Team Schedule --- Record: 0-5 |
| Date | Opponent | Location | Time | Result |
| August 21 | Flandreau Fliers Jamboree | Flandreau | 10:00 | Scrimmage |
| August 30 | Dakota Valley Panthers | Dakota Valley | 5:30 | L--0-48 |
| September 6 | Canton C-Hawks | Tri-Valley | 5:30 | L--0-34 |
| September 13 | Sioux Falls Christian Chargers | Tri-Valley | 5:30 | Called--Lightning |
| September 20 | Open | --- | --- | --- |
| September 27 | Tea Area Titans | Tea | 5:30 | L--0-52 |
| October 18 | Luverne Cardinals | Luverne | 5:00 | L--8-29 |
| October 22 | Dell Rapids Quarriers | Tri-Valley | 4:00 | L--6-8 |
| 2021 Tri-Valley Mustang Football Junior High Schedule 7th Grade Record: 6-1 8th Grade Record: 2-4 |
| Date | Opponent | Location | Time | Result |
| August 31 | Dakota Valley Panthers | Tri-Valley | 4:00 | 7th: W--22-20 8th: W--32-6 |
| September 7 | Canton C-Hawks | Canton | 4:00 | 7th: W--38-6 8th: W--36-6 |
| September 13 | Sioux Falls Christian Chargers | Sioux Falls Christian | 4:00 | 7th: W--12-6 8th: Called--Lightning |
| September 16 | Madison Bulldogs | Tri-Valley | 4:00 | 7th: W--22-6 8th: L--0-24 |
| September 28 | Open | --- | --- | --- |
| October 5 | Madison Bulldogs | Madison | 4:00 | 7th: W--26-14 8th: L--8-18 |
| October 12 | Lennox Orioles | Tri-Valley | 4:00 | 7th: W--8-6 8th: L--14-18 |
| October 19 | Vermillion Tanagers | Vermillion | 4:00 | 7th: L--0-16 8th: L--0-12 |