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| 4/26/2020 | Interstate Speedway (SD) - Jefferson, SD Casey's General Store Presents IMCA Weekly Racing Series Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact, IMCA Modified | Results | | Shannon Mahlberg (Sport Compact) | 1st | - | - | 4th |
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| 5/8/2020 | Park Jefferson International Speedway - Jefferson, SD SPRING NATIONALS PRESENTED BY RICKY LEMMEN MOTORSPORTS Hobby Stocks, Stock Cars, B Modifieds, Hornets, IMCA Modified | Results | | Shannon Mahlberg (Hornets) | 1st | - | - | 4th |
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| 5/15/2020 | Crawford County Speedway - Denison, IA Dirt Late Models: Tri-State Late Models Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets, Sport Compact | Results | | Shannon Mahlberg (Hornets) | 1st | - | - | 2nd |
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| 5/22/2020 | Crawford County Speedway - Denison, IA 305 Sprints - Winged, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets, Sport Compact | Rain Out |
| 5/27/2020 | Buena Vista Raceway - Alta, IA IMCA Speedway Motors Weekly Racing Season Opener Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact | Rain Out |
| 5/29/2020 | Crawford County Speedway - Denison, IA Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets, Sport Compact, IMCA Modified | Results | | Shannon Mahlberg (Hornets) | 3rd | - | - | 16th (DNF) |
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| 6/5/2020 | Crawford County Speedway - Denison, IA 305 Sprints - Winged, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets, Sport Compact | Results | | Shannon Mahlberg (Hornets) | 1st | - | - | 4th |
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| 6/12/2020 | Crawford County Speedway - Denison, IA Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets, Sport Compact | Results | | Shannon Mahlberg (Hornets) | 5th | - | - | 9th (DNF) |
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| 6/26/2020 | Crawford County Speedway - Denison, IA 305 Sprints - Winged, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets, Sport Compact | Results | | Shannon Mahlberg (Hornets) | 6th | - | - | DNS |
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| 7/17/2020 | Crawford County Speedway - Denison, IA 305 Sprints - Winged, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets, Sport Compact | Results | | Shannon Mahlberg (Hornets) | 1st | - | - | 1st |
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| 7/24/2020 | Crawford County Speedway - Denison, IA 360 Sprints - Winged: Malvern Bank 360 Sprints 305 Sprints - Winged, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets, Sport Compact | Results | | Shannon Mahlberg (Hornets) | 2nd | - | - | 1st |
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| 7/31/2020 | Crawford County Speedway - Denison, IA Last Points Night of Weekly Racing 305 Sprints - Winged, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets, Sport Compact | Results | | Shannon Mahlberg (Hornets) | 1st | - | - | 2nd |
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| 8/7/2020 | Crawford County Speedway - Denison, IA Denny Hovinga Special 305 Sprints - Winged, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets | Results | | Shannon Mahlberg (Hornets) | 2nd | - | - | 1st |
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| 9/8/2020 | Boone Speedway - Boone, IA 2020 IMCA Speedway Motors Super Nationals Fueled by Casey’s IMCA Northern SportMod, IMCA Hobby Stock, IMCA Sport Compact | Results | | Shannon Mahlberg (IMCA Sport Compact) | DNS | - | - | - |
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| 9/15/2020 | Clay County Fair Speedway - Spencer, IA Fair Special Dirt Late Models: Tri-State Late Models Hobby Stocks, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Shannon Mahlberg (IMCA Sport Compact) | 3rd | - | - | 2nd |
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| 9/18/2020 | Buena Vista Raceway - Alta, IA Battle at the Beaver Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact | Results | | Shannon Mahlberg (Sport Compact) | 1st | - | - | 5th |
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| 10/2/2020 | Interstate Speedway (SD) - Jefferson, SD 2nd Annual South Dakota Nationals Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Shannon Mahlberg (Sport Compact) | 5th | - | - | 5th |
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| 10/3/2020 | Interstate Speedway (SD) - Jefferson, SD South Dakota Nationals Championship 2020 Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Shannon Mahlberg (Sport Compact) | 1st | - | - | 7th |
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