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| 4/23/2021 | Fayette County Speedway - West Union, IA Weekly Points Race 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Derek Dettmann (USRA Stock Cars) | 6th | - | - | 9th |
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| 4/30/2021 | Fayette County Speedway - West Union, IA Weekly Points Race 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Derek Dettmann (USRA Stock Cars) | 6th | - | - | 12th |
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| 5/7/2021 | Fayette County Speedway - West Union, IA Weekly Points Race ~ Tuner Special 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Derek Dettmann (USRA Stock Cars) | 7th | - | - | 9th |
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| 5/14/2021 | Fayette County Speedway - West Union, IA Weekly Points Race 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Derek Dettmann (USRA Stock Cars) | 4th | - | - | 5th |
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| 5/15/2021 | Winneshiek Raceway - Decorah, IA Sponsored By Seth's Repair USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners, Mod Lites | Results | | Derek Dettmann (USRA Stock Cars) | 3rd | - | - | 8th |
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| 5/22/2021 | Winneshiek Raceway - Decorah, IA Sponsored by Weis Buick GMC USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners, Mod Lites | Results | | Derek Dettmann (USRA Stock Cars) | 6th | - | - | 6th |
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| 5/29/2021 | Deer Creek Speedway - Spring Valley, MN 18th Annual USMTS Southern MN Spring Challenge A Modifieds: USMTS - United States Modified Touring Series USRA B-Mods, USRA Stock Cars, WISSOTA Midwest Mods | Results | | Derek Dettmann (USRA Stock Cars) | 8th | - | - | 12th |
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| 5/30/2021 | Winneshiek Raceway - Decorah, IA 13th Annual USMTS Nordic Nationals A Modifieds: USMTS - United States Modified Touring Series USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars | Results | | Derek Dettmann (USRA Stock Cars) | 4th | - | - | 8th |
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| 6/4/2021 | Fayette County Speedway - West Union, IA Weekly Points Race - Sponsored by Pioneer & United Beverage 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Derek Dettmann (USRA Stock Cars) | 4th | - | - | 12th |
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| 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 | | Derek Dettmann (USRA Stock Cars) | 7th | - | - | 4th |
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| 6/11/2021 | Fayette County Speedway - West Union, IA Weekly Points Race ~ Sponsored by Alpha Tap ~ $1000 to win BMods 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Derek Dettmann (USRA Stock Cars) | 5th | - | - | 6th |
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| 6/12/2021 | Winneshiek Raceway - Decorah, IA USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners, Mod Lites | Results | | Derek Dettmann (USRA Stock Cars) | 5th | - | - | 8th |
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| 6/18/2021 | Fayette County Speedway - West Union, IA Weekly Points Race 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Derek Dettmann (USRA Stock Cars) | 7th | - | - | 13th (DNF) |
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| 6/19/2021 | Winneshiek Raceway - Decorah, IA USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners, Mod Lites | Results | | Derek Dettmann (USRA Stock Cars) | 4th | - | - | 7th |
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| 6/25/2021 | Fayette County Speedway - West Union, IA Hooker Trucking Super Late Model East Series Late Model Special Dirt Super Late Models: SLMR Late Model Series Dirt Late Models, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars | Results | | Derek Dettmann (USRA Stock Cars) | 4th | - | - | 12th |
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| 7/2/2021 | Fayette County Speedway - West Union, IA Weekly Points Race ~ Sponsored by The Place in Protivin ~ $100 extra to each feature winner 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Derek Dettmann (USRA Stock Cars) | 5th | - | - | 11th |
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| 7/13/2021 | Winneshiek Raceway - Decorah, IA Winneshiek County Fair Race USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners, Mod Lites | Results | | Derek Dettmann (USRA Stock Cars) | 4th | - | - | 7th |
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| 7/16/2021 | Fayette County Speedway - West Union, IA Weekly Points Race ~ Sponsored by KAR Auto & No Limit Diesel 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Derek Dettmann (USRA Stock Cars) | 5th | - | - | 17th (DNF) |
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| 7/21/2021 | Fayette County Speedway - West Union, IA Fayette County Fair Race - Rage Chassis 40 USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, IMCA Modified | Results | | Derek Dettmann (USRA Stock Cars) | 7th | - | - | 10th |
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| 7/31/2021 | Winneshiek Raceway - Decorah, IA Upper Iowa Speedway - Weekly Points Race USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners, Mod Lites | Results | | Derek Dettmann (USRA Stock Cars) | 4th | - | - | 9th |
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| 8/6/2021 | Fayette County Speedway - West Union, IA Weekly Points Race ~ Iowa Donor Network Race 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Derek Dettmann (USRA Stock Cars) | 8th | - | - | 11th |
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| 8/7/2021 | Winneshiek Raceway - Decorah, IA Upper Iowa Speedway - Weekly Points Race USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners, Mod Lites | Results | | Derek Dettmann (USRA Stock Cars) | 6th | - | - | 6th |
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| 8/13/2021 | Fayette County Speedway - West Union, IA Weekly Points Race ~ Sponsored by Chase Trucking ~ Hall of Fame - $1000 to win Hobby Stocks 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Derek Dettmann (USRA Stock Cars) | 5th | - | - | 10th |
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| 8/20/2021 | Fayette County Speedway - West Union, IA 2021 Season Championship ~ Sponsored by Appliance Plus of West Union 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Derek Dettmann (USRA Stock Cars) | 5th | - | - | 15th (DNF) |
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| 8/21/2021 | Winneshiek Raceway - Decorah, IA Upper Iowa Speedway - Weekly Points Race - Race Sponsored by LetterWerks USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners, Mod Lites | Results | | Derek Dettmann (USRA Stock Cars) | 5th | - | - | 9th |
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| 9/4/2021 | Deer Creek Speedway - Spring Valley, MN 16th Annual USMTS Labor Day Duel A Modifieds: USMTS - United States Modified Touring Series USRA B-Mods, USRA Late Models, USRA Stock Cars | Results | | Derek Dettmann (USRA Stock Cars) | 5th | - | - | 18th |
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| 9/5/2021 | Fayette County Speedway - West Union, IA USMTS A Modifieds: USMTS - United States Modified Touring Series USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars | Results | | Derek Dettmann (USRA Stock Cars) | 7th | - | - | 11th (DNF) |
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| 9/18/2021 | Deer Creek Speedway - Spring Valley, MN Stock Car Nationals USRA Hobby Stocks, USRA Stock Cars | Results | | Derek Dettmann (USRA Stock Cars) | 1st | - | - | 21st (DNF) |
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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 | | Derek Dettmann (USRA Stock Cars) | 4th | - | - | 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 | | Derek Dettmann (USRA Stock Cars) | 6th | - | - | 10th |
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