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| 2/17/2021 | Your Favorite Track [TEST] - Lincoln, NE Race Manager Test Stock Cars | Results | | Colby Klaassen (Stock Cars) | 1st | - | - | 3rd |
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| 2/27/2021 | Your Favorite Track [TEST] - Lincoln, NE Winter Series Final Stock Cars | Results | | Colby Klaassen (Stock Cars) | 2nd | - | 3rd | 5th |
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| 3/19/2021 | Beatrice Speedway - Beatrice, NE 28th Annual Beatrice Spring Nationals - Show #1 Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact, IMCA Modified | Results | | Colby Klaassen (Stock Cars) | 4th | - | - | 12th |
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| 3/20/2021 | Beatrice Speedway - Beatrice, NE 28th Annual Beatrice Spring Nationals - Show #2 Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact, IMCA Modified | Results | | Colby Klaassen (Stock Cars) | - | - | - | - |
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| 4/17/2021 | Park Jefferson International Speedway - Jefferson, SD Lucas Oil ASCS and RACESaver Sioux City Sprint Nationals plus IMCA Modifieds& Stock Cars 360 Sprints - Winged: ASCS National IMCA Modified, IMCA Stock Car, IMCA RaceSaver Sprint Car | Results | | Colby Klaassen (IMCA Stock Car) | 5th | - | - | 3rd |
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| 4/24/2021 | Rapid Speedway - Rock Rapids, IA Test N Tune 360 Sprints - Winged, DIRTcar Late Models, DIRTcar Sportsmans, Economy Late Models, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, IMCA RaceSaver Sprint Car | Results | | Colby Klaassen (DIRTcar Late Models) | - | - | - | - | | Colby Klaassen (USRA Stock Cars) | - | - | - | - |
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| 4/30/2021 | Rapid Speedway - Rock Rapids, IA Weekly Racing Series + 305 Sprints DIRTcar Sportsmans, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, IMCA RaceSaver Sprint Car | Results | | Colby Klaassen (USRA Stock Cars) | 1st | - | - | 17th (DNF) |
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| 5/7/2021 | Rapid Speedway - Rock Rapids, IA Rapid Speedway - WEST Dirt Super Late Models: SLMR Late Model Series DIRTcar Sportsmans, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars | Results | | Colby Klaassen (USRA Stock Cars) | 7th (DNF) | - | DNS | - |
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| 5/9/2021 | Huset's Speedway - Brandon, SD Mothers Day Opener- Rosenbauer America Night 410 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | Colby Klaassen (Street Stocks) | 4th | - | - | 16th (DNF) |
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| 5/15/2021 | I-90 Speedway - Hartford, SD Northern Outlaw Sprint Association + Paramount Racing 410 Sprints - Winged: Northern Outlaw Sprint Association 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | Colby Klaassen (Street Stocks) | 4th | - | - | 2nd |
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| 5/16/2021 | Huset's Speedway - Brandon, SD NOSA Sprint Cars- 410 Sprints - Winged: Northern Outlaw Sprint Association Street Stocks, IMCA RaceSaver Sprint Car | Results | | Colby Klaassen (Street Stocks) | 4th | - | - | 2nd |
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| 5/22/2021 | I-90 Speedway - Hartford, SD Paramount Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | Colby Klaassen (Street Stocks) | 3rd | - | - | 2nd |
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| 5/23/2021 | Huset's Speedway - Brandon, SD Growmark FS - Night 410 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | Colby Klaassen (Street Stocks) | 4th | - | - | 3rd |
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| 5/30/2021 | Huset's Speedway - Brandon, SD NOSA Sprint Cars- Frankman Motors Night 410 Sprints - Winged: Northern Outlaw Sprint Association Street Stocks, IMCA RaceSaver Sprint Car | Results | | Colby Klaassen (Street Stocks) | 5th | - | - | 5th |
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| 6/4/2021 | Rapid Speedway - Rock Rapids, IA Mark Lloyd Memorial DIRTcar Late Models, DIRTcar Sportsmans, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars | Results | | Colby Klaassen (DIRTcar Late Models) | 1st | - | - | 2nd |
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| 6/5/2021 | I-90 Speedway - Hartford, SD CCL Labels Night: Paramount Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | Colby Klaassen (Street Stocks) | 7th | - | - | 8th |
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| 6/6/2021 | Huset's Speedway - Brandon, SD I-29 RV SuperCenter - Night 410 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | Colby Klaassen (Street Stocks) | 8th (DNF) | - | - | 8th |
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| 6/12/2021 | I-90 Speedway - Hartford, SD MSTS at I-90 Speedway with Power Series 360 Sprints - Winged: Midwest Power Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | Colby Klaassen (Street Stocks) | 4th | - | - | 2nd |
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| 6/12/2021 | Your Favorite Track [TEST] - Lincoln, NE | Results | | Colby Klaassen (Stock Cars) | 12th | - | - | 2nd |
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| 6/13/2021 | Huset's Speedway - Brandon, SD NOSA Sprint Cars - Seal Pros Night 410 Sprints - Winged: Northern Outlaw Sprint Association Street Stocks, IMCA RaceSaver Sprint Car | Results | | Colby Klaassen (Street Stocks) | 2nd | - | - | 2nd |
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| 6/19/2021 | I-90 Speedway - Hartford, SD Precision Drywall presents: Hartford Night w/ Paramount Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | Colby Klaassen (Street Stocks) | 5th | - | - | 3rd |
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| 6/20/2021 | Huset's Speedway - Brandon, SD Royal River Casino Night - $6,000 to Win 410 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | Colby Klaassen (Street Stocks) | 6th | - | - | 2nd |
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| 7/2/2021 | Murray County Speedway - Slayton, MN Emergency Services Night with Late Model Street Stocks Factory Stocks, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Street Stocks, Sport Compact | Results | | Colby Klaassen (Street Stocks) | 1st | - | - | 6th |
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| 7/3/2021 | I-90 Speedway - Hartford, SD MSTS at I-90 Speedway 360 Sprints - Winged, 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | Colby Klaassen (Street Stocks) | 3rd | - | - | 6th |
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| 7/10/2021 | I-90 Speedway - Hartford, SD Paramount Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | Colby Klaassen (Street Stocks) | 5th | - | - | 5th |
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| 7/11/2021 | Huset's Speedway - Brandon, SD NOSA Sprint Cars - Big Frig Night 410 Sprints - Winged: Northern Outlaw Sprint Association Street Stocks, IMCA RaceSaver Sprint Car | Results | | Colby Klaassen (Street Stocks) | 5th | - | - | 10th (DNF) |
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| 7/17/2021 | I-90 Speedway - Hartford, SD MSTS at I-90 Speedway 360 Sprints - Winged, 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | Colby Klaassen (Street Stocks) | 6th (DNF) | - | - | 4th |
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| 7/18/2021 | Huset's Speedway - Brandon, SD Hall of Fame Night - Presented by Spartan ER 410 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | Colby Klaassen (Street Stocks) | 6th | - | - | 9th |
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| 7/24/2021 | I-90 Speedway - Hartford, SD Dirt Late Models: Tri-State Late Models 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | Colby Klaassen (Street Stocks) | 5th | - | - | 8th |
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| 7/25/2021 | Huset's Speedway - Brandon, SD Nordstrom's Automotive Night 410 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | Colby Klaassen (Street Stocks) | 6th | - | - | 8th |
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| 7/31/2021 | I-90 Speedway - Hartford, SD Chuck Zitterich Memorial at I-90 Speedway with Power Series 360 Sprints - Winged: Midwest Power Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | Colby Klaassen (Street Stocks) | 2nd | - | - | 5th |
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| 8/1/2021 | Huset's Speedway - Brandon, SD Bull Haulers Brawl - Presented by Folkens Brothers Trucking - Gates Open 4:30 PM - Racing 8:00 PM 410 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | Colby Klaassen (Street Stocks) | 2nd | - | - | 2nd |
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| 8/7/2021 | I-90 Speedway - Hartford, SD Paramount Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | Colby Klaassen (Street Stocks) | 7th | - | - | 6th |
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| 8/13/2021 | Rapid Speedway - Rock Rapids, IA $1,500 to win at Rapid Speedway Dirt Late Models: Tri-State Late Models DIRTcar Sportsmans, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars | Results | | Colby Klaassen (USRA Stock Cars) | 1st | - | - | 2nd |
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| 8/14/2021 | I-90 Speedway - Hartford, SD Hartford Vet Clinic presents: Pitstop Challenge & Paramount Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | Colby Klaassen (Street Stocks) | 2nd | - | - | 6th |
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| 8/21/2021 | I-90 Speedway - Hartford, SD LMSS Legends & Paramount Racing Series 305 Sprints - Winged, Street Stocks, Masters Legends, USRA B-Mods, USRA Hobby Stocks | Results | | Colby Klaassen (Street Stocks) | 5th | - | - | 11th |
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| 8/22/2021 | Huset's Speedway - Brandon, SD World of Outlaws Sprint Car Series- Pioneer BIN BUSTER BASH 410 Sprints - Winged: World of Outlaws Street Stocks | Results | | Colby Klaassen (Street Stocks) | 8th | - | - | 10th |
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| 8/29/2021 | Huset's Speedway - Brandon, SD NOSA Sprint Cars- Ace Ready Mix/ Myrl & Roy's Paving Night 410 Sprints - Winged: Northern Outlaw Sprint Association Street Stocks, IMCA RaceSaver Sprint Car | Results | | Colby Klaassen (Street Stocks) | 6th | - | - | 8th |
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| 9/4/2021 | I-90 Speedway - Hartford, SD Dirt Late Models: Tri-State Late Models Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | Colby Klaassen (Street Stocks) | 2nd | - | - | 2nd |
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| 9/11/2021 | I-90 Speedway - Hartford, SD Paramount Racing Series Championship 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | Colby Klaassen (Street Stocks) | 1st | - | - | 2nd |
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| 9/14/2021 | Clay County Fair Speedway - Spencer, IA Clay County Fair $2,000 to win [PREMIER EVENT] 360 Sprints - Winged: ASCS National Dirt Late Models: Tri-State Late Models 410 Sprints - Winged, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Colby Klaassen (IMCA Stock Car) | 5th | - | - | 8th |
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| 9/17/2021 | Rapid Speedway - Rock Rapids, IA Rapid Speedway Nationals USRA Hobby Stocks, USRA Stock Cars, IMCA RaceSaver Sprint Car | Results | | Colby Klaassen (USRA Stock Cars) | 5th | - | - | 3rd |
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| 9/24/2021 | Huset's Speedway - Brandon, SD C & B Operations Cheater's Night / Tri-State Late Models Dirt Late Models: Tri-State Late Models Hobby Stocks, B Modifieds, Street Stocks | Results | | Colby Klaassen (Street Stocks) | 1st | - | - | 3rd |
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| 9/25/2021 | Huset's Speedway - Brandon, SD CHAMPIONSHIP WEEKEND -NOSA 410 Outlaw Sprint Cars 410 Sprints - Winged: Northern Outlaw Sprint Association 360 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | Colby Klaassen (Street Stocks) | 1st | - | - | 3rd |
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