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| 4/18/2021 | Interstate Speedway (SD) - Jefferson, SD IMCA Frostbuster IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 2nd | - | - | 4th |
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| 4/25/2021 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Racing IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 4th | - | 3rd | 8th |
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| 5/2/2021 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Racing IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 6th | - | - | 7th |
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| 5/9/2021 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Series IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 1st | - | - | 6th |
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| 5/16/2021 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Series Dirt Late Models: Tri-State Late Models IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 2nd | - | - | 16th |
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| 5/23/2021 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Series IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 2nd | - | - | 10th |
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| 5/30/2021 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Series IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 3rd | - | - | 4th |
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| 5/31/2021 | Park Jefferson International Speedway - Jefferson, SD Memorial Day Duels $1,000 to win IMCA Modifieds/Stock Cars/RACESavers plus IMCA Sport Mods & Hobbies B Modifieds, Street Stocks, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Jeremy Ertman (Street Stocks) | 5th | - | - | 10th | | Jeremy Ertman (IMCA Hobby Stock) | 5th | - | - | 6th |
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| 6/4/2021 | Park Jefferson International Speedway - Jefferson, SD $10,000 to win USMTS Challenge plus Stocks, Sp Mods, Hobbies A Modifieds: USMTS - United States Modified Touring Series B Modifieds, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Jeremy Ertman (IMCA Hobby Stock) | 2nd | - | - | 2nd |
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| 6/6/2021 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Series B Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 1st | - | - | 3rd |
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| 6/13/2021 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Series IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 2nd | - | - | 12th |
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| 6/20/2021 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Series IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 6th (DNF) | - | - | 5th |
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| 6/27/2021 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Series IMCA Modified: Midwest Madness Tour IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 2nd | - | - | 4th |
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| 6/29/2021 | Clay County Fair Speedway - Spencer, IA Midwest Madness Tour IMCA Modified: Midwest Madness Tour IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 9th (DNF) | - | 4th | 24th (DNF) |
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| 6/30/2021 | Buena Vista Raceway - Alta, IA Midwest Madness Tour/Kyle Suter Memorial Race IMCA Modified: Midwest Madness Tour Hobby Stocks, Stock Cars, B Modifieds, Sport Compact, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 6th | - | - | 16th |
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| 7/1/2021 | Stuart Speedway - Stuart, IA Ron Little Memorial IMCA Modified: Midwest Madness Tour 600cc Modifieds, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 4th | - | - | 16th |
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| 7/4/2021 | Interstate Speedway (SD) - Jefferson, SD 4th of July Racing IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 5th | - | 1st | 7th |
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| 7/11/2021 | Interstate Speedway (SD) - Jefferson, SD IMCA Mid Season Championship IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 3rd | - | - | 18th |
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| 7/18/2021 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Racing IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 2nd | - | - | 18th (DNF) |
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| 7/24/2021 | Worthington Speedway - Worthington, MN Regular Night Hobby Stocks, Stock Cars, Sportsmans, A Modifieds, B Modifieds, Sport Compact, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (Hobby Stocks) | 4th | - | - | 14th (DNF) |
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| 7/26/2021 | Park Jefferson International Speedway - Jefferson, SD $1,000 to win IMCA Fast Shafts Qualifier at Park Jefferson B Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Jeremy Ertman (IMCA Hobby Stock) | 4th | - | - | 2nd |
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| 8/6/2021 | Wagner Speedway - Wagner, SD Week 13 Hobby Stocks, Dirt Late Models, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (Hobby Stocks) | - | - | - | - | | Jeremy Ertman (IMCA Hobby Stock) | 2nd | - | - | 2nd |
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| 8/8/2021 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Racing IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 3rd | - | - | 3rd |
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| 8/9/2021 | Park Jefferson International Speedway - Jefferson, SD J&J Fitting Iron Cup Night 1 B Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 4th | - | - | 17th |
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| 8/10/2021 | Park Jefferson International Speedway - Jefferson, SD J&J Fitting Iron Cup Night 2 B Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 3rd | - | - | 6th |
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| 8/14/2021 | Park Jefferson International Speedway - Jefferson, SD I State Truck Center IMCA Championship plus $2,000 to win Tri-State Late Models by Zeitner & Sons Dirt Late Models: Tri-State Late Models Hobby Stocks, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Jeremy Ertman (Hobby Stocks) | - | - | - | - | | Jeremy Ertman (IMCA Hobby Stock) | 2nd | - | - | 4th |
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| 8/15/2021 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Racing IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jeremy Ertman (IMCA Hobby Stock) | 5th | - | - | 14th |
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