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| 4/23/2021 | Mississippi Thunder Speedway - Fountain City, WI 13th Annual Season Opener presented by Kelly Iverson Trucking Hornets, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks | Results | | Steve Holthaus (USRA Hobby Stocks) | 4th | - | - | 5th |
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| 4/30/2021 | Mississippi Thunder Speedway - Fountain City, WI Weekly Racing Hornets, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks | Results | | Steve Holthaus (USRA Hobby Stocks) | 2nd | - | - | 5th |
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| 5/14/2021 | Mississippi Thunder Speedway - Fountain City, WI Weekly Racing Hornets, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks | Rain Out |
| 6/5/2021 | Winneshiek Raceway - Decorah, IA Race Sponsored by KVIK USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners, Mod Lites | Results | | Steve Holthaus (USRA Hobby Stocks) | 5th | - | - | 8th | | Steve Holthaus (Mod Lites) | - | - | - | - |
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| 6/24/2021 | Cresco Speedway - Cresco, IA Cresco Speeway - EAST Dirt Super Late Models: SLMR Late Model Series USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars | Results | | Steve Holthaus (USRA Hobby Stocks) | 1st | - | - | 3rd |
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| 7/2/2021 | Mississippi Thunder Speedway - Fountain City, WI Karl Fenske Memorial Dirt Late Models, Hornets, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks | Results | | Steve Holthaus (USRA Hobby Stocks) | 1st | - | - | 1st |
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| 7/9/2021 | Mississippi Thunder Speedway - Fountain City, WI Firecracker 40 Dirt Late Models, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks | Results | | Steve Holthaus (USRA Hobby Stocks) | 2nd | - | - | 1st |
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| 7/16/2021 | Mississippi Thunder Speedway - Fountain City, WI USRA Late Model Special 125cc Winged Micros, Hornets, USRA B-Mods, USRA Late Models, USRA Hobby Stocks | Results | | Steve Holthaus (USRA Hobby Stocks) | 1st | - | - | 7th |
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| 7/23/2021 | Cresco Speedway - Cresco, IA Friday Night Races at Cresco Speedway 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Steve Holthaus (USRA Hobby Stocks) | 1st | - | - | 7th |
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| 7/30/2021 | Mississippi Thunder Speedway - Fountain City, WI K-Town Klash USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks | Results | | Steve Holthaus (USRA Hobby Stocks) | 4th | - | - | 6th |
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| 8/6/2021 | Mississippi Thunder Speedway - Fountain City, WI Weekly Racing Hornets, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks | Results | | Steve Holthaus (USRA Hobby Stocks) | 1st | - | - | 3rd |
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| 9/18/2021 | Deer Creek Speedway - Spring Valley, MN Stock Car Nationals USRA Hobby Stocks, USRA Stock Cars | Results | | Steve Holthaus (USRA Hobby Stocks) | 8th | - | 5th | - |
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| 10/1/2021 | Mississippi Thunder Speedway - Fountain City, WI The Great Pumpkin Race Hornets, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks, USRA Stock Cars | Results | | Steve Holthaus (USRA Hobby Stocks) | 3rd | - | - | 5th |
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| 10/2/2021 | Mississippi Thunder Speedway - Fountain City, WI The Great Pumpkin Race Hornets, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks, USRA Stock Cars | Results | | Steve Holthaus (USRA Hobby Stocks) | 8th (DNF) | - | DNS | - |
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