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| 7/10/2021 | Mississippi Thunder Kart Track - Fountain City, WI Points Race #5 Winged Sprints, Restricted 'A' Class, 125cc Winged Micros, Junior 1 Lites Dirt Karts, Junior 2 Lites Dirt Karts, Adult Open, Dirt Cage Kart Junior 1, Flat Adult Clone Heavy, 250 Winged Outlaw, 500 Winged Open Outlaw, LO 206 Dirt Karts, Junior Slingshots | Results | | Gavin Underdahl (125cc Winged Micros) | 6th | - | - | 4th |
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| 7/17/2021 | Mississippi Thunder Kart Track - Fountain City, WI Points Race #6 Winged Sprints, Restricted 'A' Class, 125cc Winged Micros, Junior 1 Lites Dirt Karts, Junior 2 Lites Dirt Karts, Dirt Cage Kart Junior 1, Flat Adult Clone Heavy, 250 Winged Outlaw, LO 206 Dirt Karts, Junior Slingshots | Results | | Gavin Underdahl (125cc Winged Micros) | 4th (DNF) | - | - | 2nd |
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| 8/5/2021 | Mississippi Thunder Kart Track - Fountain City, WI Winged Sprints, 125cc Winged Micros, Junior 2 Lites Dirt Karts, Dirt Cage Kart Junior 1, Flat Adult Clone Heavy, 250 Winged Outlaw, 500 Winged Open Outlaw, LO 206 Dirt Karts, Junior Slingshots | Results | | Gavin Underdahl (125cc Winged Micros) | - | - | - | - |
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| 8/7/2021 | Mississippi Thunder Kart Track - Fountain City, WI Battle of the Wings Winged Sprints, 125cc Winged Micros, Junior 1 Lites Dirt Karts, Junior 2 Lites Dirt Karts, Dirt Cage Kart Junior 1, Flat Adult Clone Heavy, 250 Winged Outlaw, 500 Winged Open Outlaw, LO 206 Dirt Karts, Junior Slingshots | Rain Out |
| 8/21/2021 | Mississippi Thunder Kart Track - Fountain City, WI Points Race #8 Winged Sprints, Restricted 'A' Class, 125cc Winged Micros, Junior Class, Junior Champ, Junior 1 Lites Dirt Karts, Junior 2 Lites Dirt Karts, Adult Open, Dirt Cage Kart Junior 1, Flat Adult Clone Heavy, 250 Winged Outlaw, LO 206 Dirt Karts, Junior Slingshots | Results | | Gavin Underdahl (125cc Winged Micros) | 7th | - | - | 6th |
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| 9/24/2021 | Mississippi Thunder Kart Track - Fountain City, WI Spooktacular - Day 1 Winged Sprints, 125cc Winged Micros, Junior Sprints, Junior 1 Lites Dirt Karts, Junior 2 Lites Dirt Karts, Dirt Cage Kart Junior 1, Flat Adult Clone Heavy, 250 Winged Outlaw, LO 206 Dirt Karts, Junior Slingshots | Results | | Gavin Underdahl (125cc Winged Micros) | 5th | - | - | 4th |
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| 9/25/2021 | Mississippi Thunder Kart Track - Fountain City, WI Spooktacular - Day 2 Winged Sprints, 125cc Winged Micros, Junior Sprints, Junior Champ, Junior 1 Lites Dirt Karts, Junior 2 Lites Dirt Karts, Dirt Cage Kart Junior 1, Flat Adult Clone Heavy, 250 Winged Outlaw, LO 206 Dirt Karts, Mod Lites, Junior Slingshots, LO 206 Cage Adult Winged | Results | | Gavin Underdahl (125cc Winged Micros) | 6th | - | - | 5th |
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| 10/9/2021 | Cedar Lake Speedway Indoor Arena - New Richmond, WI Pumpkin 100 @ Rice Lake Speed Pit Junior 1 Lites Dirt Karts, Junior 2 Lites Dirt Karts, Junior 2 Medium Dirt Karts, Adult Medium, Rookie Class, Junior Kohler Cage, Restricted Box Stock, 125 Yamaha, Flat Adult Clone Heavy, 500 Winged Open Outlaw, Clone Heavy Dirt Karts, Junior 3 Medium Dirt Karts, Flat Jr. 2 Clone Heavy | Results | | Gavin Underdahl (500 Winged Open Outlaw) | 4th | - | - | 5th (DNF) |
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