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| 5/1/2021 | Sherman County Speedway - Goodland, KS Season Opener Sport Compact, Pure Stock, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Nathan Armbruster (Pure Stock) | 1st | - | - | 1st |
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| 5/2/2021 | Sherman County Speedway - Goodland, KS Super Sunday Season Opener Sport Compact, Pure Stock, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Nathan Armbruster (Pure Stock) | 3rd | - | - | 3rd |
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| 6/5/2021 | Sherman County Speedway - Goodland, KS Summer Kick Off Sport Compact, Pure Stock, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Nathan Armbruster (Pure Stock) | 1st | - | - | 1st |
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| 6/6/2021 | Sherman County Speedway - Goodland, KS Cowboy Clash 305 Sprints - Winged, Sport Compact, Pure Stock, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Nathan Armbruster (Pure Stock) | 1st | - | - | 4th (DNF) |
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| 7/17/2021 | Sherman County Speedway - Goodland, KS Mid Summer Classic Sport Compact, Pure Stock, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Nathan Armbruster (Pure Stock) | 1st | - | - | 1st |
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| 8/7/2021 | Sherman County Speedway - Goodland, KS Fair Race with High Plains Late Model Series Dirt Late Models, Sport Compact, Pure Stock, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Nathan Armbruster (Pure Stock) | 1st | - | - | 1st |
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| 8/8/2021 | Sherman County Speedway - Goodland, KS Sport Compact, Pure Stock, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Nathan Armbruster (Pure Stock) | 1st | - | - | 1st |
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| 8/21/2021 | Sherman County Speedway - Goodland, KS Bill Gray/Season Championship Night Sport Compact, Pure Stock, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Nathan Armbruster (Pure Stock) | 1st | - | - | 1st |
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| 9/24/2021 | Sherman County Speedway - Goodland, KS 32nd Annual Flatlanders Fall Classic Sport Compact, Pure Stock, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Nathan Armbruster (Pure Stock) | 1st | - | 1st | - |
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| 9/25/2021 | Sherman County Speedway - Goodland, KS 32nd Annual Flatlanders Fall Classic Sport Compact, Pure Stock, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Nathan Armbruster (Pure Stock) | - | - | - | 1st |
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| 10/2/2021 | RPM Speedway - Hays, KS Fall Nationals Night 2 Generic 1, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Nathan Armbruster (Generic 1) | 1st | - | - | 2nd |
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