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| 5/12/2021 | Crystal Motor Speedway - Crystal, MI Eastern IMCA Allstars - IMCA Modifieds, IMCA Stock Cars, and Cyber Stock Hobby Stocks, A Modifieds, Sport Compact, IMCA Stock Car | Results | | Kolby Rohn (Hobby Stocks) | 8th (DNF) | - | - | DNS |
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| 5/15/2021 | Crystal Motor Speedway - Crystal, MI Relay for Life Fundraiser and Veterans Day - Free admission with ID Hobby Stocks, A Modifieds, Street Stocks, Dirt Late Models, Junior 1 Lites Dirt Karts, Dirt Pro Trucks, Mini Wedge, Sport Compact | Results | | Kolby Rohn (Dirt Pro Trucks) | 3rd | - | - | 12th |
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| 5/29/2021 | Crystal Motor Speedway - Crystal, MI 360 Sprints - Winged: GLSS-Great Lakes Super Sprints Hobby Stocks, A Modifieds, Street Stocks, Dirt Late Models, Dirt Pro Trucks, Mini Outlaws, Sport Compact | Results | | Kolby Rohn (Dirt Pro Trucks) | 6th (DNF) | - | - | 9th (DNF) |
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| 5/30/2021 | Crystal Motor Speedway - Crystal, MI 410 Sprints - Non-Winged: Great Lakes Traditional Sprints Hobby Stocks, A Modifieds, Street Stocks, Dirt Late Models, Dirt Pro Trucks, Sport Compact | Results | | Kolby Rohn (Dirt Pro Trucks) | 2nd | - | - | 2nd |
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| 6/5/2021 | Crystal Motor Speedway - Crystal, MI IMCA Challenge - $1252 to Win Sponsored by Lane Automotive-Allstar Performance Hobby Stocks, A Modifieds, Street Stocks, Dirt Late Models, Junior 1 Lites Dirt Karts, Dirt Pro Trucks, Mini Wedge, Sport Compact | Results | | Kolby Rohn (Dirt Pro Trucks) | 6th (DNF) | - | - | DNS |
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| 6/12/2021 | Crystal Motor Speedway - Crystal, MI Lightning Sprints: Great Lakes Lightning Sprints Hobby Stocks, A Modifieds, Street Stocks, Dirt Late Models, Dirt Pro Trucks, Sport Compact | Results | | Kolby Rohn (Dirt Pro Trucks) | - | - | - | - |
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| 6/19/2021 | Crystal Motor Speedway - Crystal, MI Full Show - Sponsored by Carson City Lumber Hobby Stocks, A Modifieds, Street Stocks, Dirt Late Models, Dirt Pro Trucks, Sport Compact | Results | | Kolby Rohn (Dirt Pro Trucks) | 2nd | - | - | 11th |
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| 7/2/2021 | Winston Speedway - Rothbury, MI James Traxler Memorial $2100 to WIN for Street Stocks Full Show with Fireworks Asphalt Mini Stocks, Stock Cars, Sportsmans, B Modifieds, Street Stocks, Dirt Late Models, Hornets, Mini Wedge, IMCA Modified | Results | | Kolby Rohn (B Modifieds) | - | - | - | - |
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| 7/10/2021 | Crystal Motor Speedway - Crystal, MI S.O.D. Sprints - NO PRO STOCKS Hobby Stocks, A Modifieds, Street Stocks, Dirt Late Models, Dirt Pro Trucks, Sport Compact | Results | | Kolby Rohn (Dirt Pro Trucks) | 1st | - | - | 3rd |
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| 7/17/2021 | Crystal Motor Speedway - Crystal, MI YES 2 KIDS - Autographs from 6:00-7:00 p.m. Hobby Stocks, A Modifieds, Street Stocks, Dirt Late Models, Junior 1 Lites Dirt Karts, Dirt Pro Trucks, Mini Wedge, Sport Compact | Results | | Kolby Rohn (Street Stocks) | 3rd | - | - | 8th |
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| 7/31/2021 | Crystal Motor Speedway - Crystal, MI Lightning Sprints: Great Lakes Lightning Sprints Hobby Stocks, A Modifieds, Street Stocks, Dirt Late Models, Junior 1 Lites Dirt Karts, Dirt Pro Trucks, Mini Wedge, Sport Compact | Results | | Kolby Rohn (Street Stocks) | 1st | - | - | 19th |
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| 8/7/2021 | Crystal Motor Speedway - Crystal, MI Full Show - Sponsored by H & H EXCAVATING Hobby Stocks, A Modifieds, Street Stocks, Dirt Late Models, Junior 1 Lites Dirt Karts, Dirt Pro Trucks, Mini Wedge, Sport Compact | Results | | Kolby Rohn (Street Stocks) | 5th | - | - | 10th |
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| 8/14/2021 | Crystal Motor Speedway - Crystal, MI G.L.O.W. Vintage Modifieds - Sponsored by Engine Pro Hobby Stocks, A Modifieds, Street Stocks, Dirt Late Models, Junior 1 Lites Dirt Karts, Dirt Pro Trucks, Mini Wedge, Sport Compact | Results | | Kolby Rohn (Street Stocks) | 10th | - | 8th | - |
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| 8/21/2021 | Crystal Motor Speedway - Crystal, MI Full Show Hobby Stocks, A Modifieds, Street Stocks, Dirt Late Models, Junior 1 Lites Dirt Karts, Dirt Pro Trucks, Mini Wedge, Sport Compact | Results | | Kolby Rohn (Street Stocks) | 5th | - | - | 16th | | Kolby Rohn (Dirt Pro Trucks) | - | - | - | - |
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| 9/4/2021 | Crystal Motor Speedway - Crystal, MI 410 Sprints - Non-Winged: Great Lakes Traditional Sprints Lightning Sprints: Great Lakes Lightning Sprints Hobby Stocks, A Modifieds, Street Stocks, Junior 1 Lites Dirt Karts, Dirt Pro Trucks, Mini Wedge, Sport Compact | Results | | Kolby Rohn (Street Stocks) | 4th | - | - | 7th |
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| 9/5/2021 | Crystal Motor Speedway - Crystal, MI Outlaw Late Models & Open Modifieds Dirt Super Late Models, Hobby Stocks, B Modifieds, Street Stocks, Dirt Late Models, 410 Sprints - Non-Winged, Lightning Sprints, Dirt Pro Trucks, Sport Compact | Results | | Kolby Rohn (Street Stocks) | 5th | - | 1st | 14th |
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| 9/18/2021 | Crystal Motor Speedway - Crystal, MI Great Lakes Nationals 410 Sprints - Non-Winged: Great Lakes Traditional Sprints Hobby Stocks, A Modifieds, Street Stocks, Dirt Late Models, Junior 1 Lites Dirt Karts, Dirt Pro Trucks, Mini Wedge, Sport Compact | Results | | Kolby Rohn (Sport Compact) | 3rd | - | - | 13th |
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