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| 4/17/2021 | Hamilton County Speedway - Webster City, IA Malvern Bank $3,000-to-Win Late Models Dirt Super Late Models: SLMR Late Model Series USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Lincoln Miller (USRA Hobby Stocks) | 5th | - | - | 14th |
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| 4/24/2021 | Hamilton County Speedway - Webster City, IA Modified Madness $2,000-to-Win Mods A Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Lincoln Miller (USRA Hobby Stocks) | 3rd | - | - | 10th |
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| 4/30/2021 | Hancock County Speedway - Britt, IA Weekly Racing - Point Invert Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact | Results | | Lincoln Miller (Hobby Stocks) | 6th | - | - | 10th |
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| 5/7/2021 | Sports Park Raceway - Fort Dodge, IA Season Opener USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Lincoln Miller (USRA Hobby Stocks) | 2nd | - | - | 8th |
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| 5/14/2021 | Sports Park Raceway - Fort Dodge, IA Summit USRA Weekly Racing Series USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Lincoln Miller (USRA Hobby Stocks) | 3rd | - | - | 8th |
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| 5/15/2021 | Hamilton County Speedway - Webster City, IA Kid's Night + $1,000-to-Win Mods USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Lincoln Miller (USRA Hobby Stocks) | 4th | - | - | 15th (DNF) |
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| 6/4/2021 | Sports Park Raceway - Fort Dodge, IA Summit USRA Weekly Racing Series USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Lincoln Miller (USRA Hobby Stocks) | 7th (DNF) | - | - | 15th (DNF) |
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| 6/11/2021 | Sports Park Raceway - Fort Dodge, IA Summit USRA Weekly Racing Series USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Lincoln Miller (USRA Hobby Stocks) | 6th | - | - | 11th (DNF) |
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| 6/12/2021 | Hamilton County Speedway - Webster City, IA Karl Chevrolet Fan Appreciation Night + Kid's Night Dirt Super Late Models, Super Truck, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Lincoln Miller (USRA Hobby Stocks) | 8th (DNF) | - | - | 10th |
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| 6/18/2021 | Sports Park Raceway - Fort Dodge, IA Summit USRA Weekly Racing Series USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Lincoln Miller (USRA Hobby Stocks) | 5th | - | - | 13th (DNF) |
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| 6/19/2021 | Hamilton County Speedway - Webster City, IA Malvern Bank SLMR Bill Rice Memorial $3,000-to-Win Late Models Dirt Super Late Models: SLMR Late Model Series USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Lincoln Miller (USRA Hobby Stocks) | 4th | - | - | 7th |
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| 6/22/2021 | Hancock County Speedway - Britt, IA MAXYIELD SPORT MOD NATIONALS $2,500 to WIN Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact | Results | | Lincoln Miller (Hobby Stocks) | 6th | - | - | 7th |
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| 7/2/2021 | Crawford County Speedway - Denison, IA Regular Night All Classes-$600 to win Hobby Stock and $400 to win Sport Compact 305 Sprints - Winged, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets | Results | | Lincoln Miller (Hobby Stocks) | 7th | - | - | 19th (DNF) |
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| 7/16/2021 | Sports Park Raceway - Fort Dodge, IA Summit USRA Weekly Racing Series B Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Lincoln Miller (USRA Hobby Stocks) | 3rd | - | - | 6th |
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| 7/17/2021 | Hamilton County Speedway - Webster City, IA Casey's Salute The Troops + HCPOA Night Dirt Super Late Models, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Lincoln Miller (USRA Hobby Stocks) | 7th | - | - | 8th |
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| 7/21/2021 | Hamilton County Speedway - Webster City, IA Wildcard Wednesday Presented by Peoples Credit Union Dirt Super Late Models, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Lincoln Miller (USRA Hobby Stocks) | 7th | - | - | 8th |
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| 7/24/2021 | Hamilton County Speedway - Webster City, IA Kids Night At The Fair Presented by Good Life RV Dirt Super Late Models, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Lincoln Miller (USRA Hobby Stocks) | 6th | - | - | 8th |
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| 7/31/2021 | Hamilton County Speedway - Webster City, IA USRA Weekly Racing Presented by D&B Agro USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Lincoln Miller (USRA Hobby Stocks) | 3rd | - | - | 3rd |
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| 8/6/2021 | Hancock County Speedway - Britt, IA Annual Night of 1,000 Stars - $3,000 to WIN Modifieds Sponsored BY JAKS PUPPIES Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact, IMCA Modified | Results | | Lincoln Miller (Hobby Stocks) | 5th | - | - | 8th (DNF) |
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| 8/7/2021 | Hancock County Speedway - Britt, IA Annual Night of 10,000 Stars - $4,000 to WIN Modifieds Corteva Agriscience, Asmus Supply, Sents Seed Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, 600cc Modifieds, Sport Compact, IMCA Modified | Results | | Lincoln Miller (Hobby Stocks) | 3rd | - | - | 4th |
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| 8/27/2021 | Sports Park Raceway - Fort Dodge, IA Season Championship Night and Tuff Trucks Super Truck, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Lincoln Miller (USRA Hobby Stocks) | 7th | - | - | 9th |
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| 8/28/2021 | Hamilton County Speedway - Webster City, IA Karl Chevrolet Driver Appreciation Night A Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Lincoln Miller (USRA Hobby Stocks) | 5th | - | - | 11th |
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| 10/23/2021 | Hamilton County Speedway - Webster City, IA Fall Futurity Night #2 Dirt Super Late Models, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Lincoln Miller (USRA Hobby Stocks) | 6th | - | - | 14th |
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