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| 5/12/2021 | Stuart Speedway - Stuart, IA Jake Durbin Memorial 600cc Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact, IMCA Mod Lite | Results | | Nathan Kilwine (600cc Modifieds) | 2nd | - | - | 1st |
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| 5/29/2021 | Hibbing Raceway - Hibbing, MN Powder Puff Enduro Night 360 Sprints - Winged, 600cc Modifieds, WISSOTA Late Model, WISSOTA Pure Stock, WISSOTA Hornet | Results | | Nathan Kilwine (600cc Modifieds) | 1st | - | - | 2nd |
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| 6/16/2021 | Stuart Speedway - Stuart, IA Dynamic Drivelines Dirt Duel 600cc Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Nathan Kilwine (600cc Modifieds) | 1st | - | - | 3rd |
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| 6/17/2021 | Kossuth County Speedway - Algona, IA Outlaw Mini Mod & Weekly IMC Racing B Modifieds, Street Stocks, 600cc Modifieds, Enduro, IMCA Modified, IMCA Hobby Stock, IMCA Sport Compact | Results | | Nathan Kilwine (600cc Modifieds) | 1st | - | - | 2nd |
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| 6/18/2021 | Marshalltown Speedway - Marshalltown, IA RBF Electric $400.00 to Win IMCA Hobby Stocks Dwarf, Dirt Pro Trucks, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, Sportsman Dwarf | Results | | Nathan Kilwine (Sportsman Dwarf) | 2nd | - | - | 5th |
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| 6/19/2021 | Boone Speedway - Boone, IA Saturday Night Series Weekly #10 Dwarf, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Mod Lite | Results | | Nathan Kilwine (Dwarf) | 8th | - | - | DNS |
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| 6/25/2021 | Chateau Speedway - Lansing, MN Wissota Midwest Mod vs. Usra B Mod Challenge Event Night 1 Winged Outlaw, USRA B-Mods, USRA Modifieds, WISSOTA Midwest Mods, WISSOTA Pure Stock, WISSOTA Street Stock, WISSOTA Hornet | Results | | Nathan Kilwine (Winged Outlaw) | 2nd | - | - | 1st |
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| 7/11/2021 | Mason City Motor Speedway - Mason City, IA Joel Showalter Memorial Presented by Window World 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars | Results | | Nathan Kilwine (600cc Modifieds) | 1st | - | - | 3rd |
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| 7/16/2021 | Princeton Speedway - Princeton, MN Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact, IMCA Stock Car, WISSOTA Super Stock | Results | | Nathan Kilwine (Stock Cars) | 1st | - | - | 2nd |
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| 7/17/2021 | Cedar Lake Speedway - New Richmond, WI CLS Dash #10 / Pro Stock $5,000 To Win 360 Sprints - Non-Winged: UMSS - Traditional Sprint Car Series 305 Sprints - Non-Winged, 600cc Modifieds, Super Stocks, USRA Late Models | Results | | Nathan Kilwine (600cc Modifieds) | 1st | - | - | 1st |
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| 7/18/2021 | Mason City Motor Speedway - Mason City, IA United States Modified Touring Series fueled by Casey's A Modifieds: USMTS - United States Modified Touring Series 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars | Results | | Nathan Kilwine (600cc Modifieds) | 1st | - | - | 1st |
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| 7/25/2021 | Mason City Motor Speedway - Mason City, IA Kids Night 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars | Results | | Nathan Kilwine (600cc Modifieds) | 1st | - | - | 1st |
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| 8/8/2021 | Mason City Motor Speedway - Mason City, IA Ted Zieman Memorial (Fair Races) Presented by Pabst Blue Ribbon 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars | Results | | Nathan Kilwine (600cc Modifieds) | 9th (DNF) | - | - | 3rd |
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| 8/15/2021 | Mason City Motor Speedway - Mason City, IA B-Mod Challenge Presented by Kabrick Distributing 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars | Results | | Nathan Kilwine (600cc Modifieds) | 1st | - | - | 3rd |
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| 8/22/2021 | Mason City Motor Speedway - Mason City, IA Driver Appreciation Night 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Nathan Kilwine (600cc Modifieds) | 1st | - | - | 1st |
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| 9/4/2021 | Greenbush Race Park - Greenbush, MN Season Finale Day 1 Midgets: POWRi Lightning Sprints: POWRi Minn-Kota Lightning Sprints 360 Sprints - Non-Winged, 600cc Modifieds, Sport Compact, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Pure Stock, WISSOTA Street Stock | Results | | Nathan Kilwine (600cc Modifieds) | 1st | - | - | 7th |
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| 9/5/2021 | Greenbush Race Park - Greenbush, MN Season Finale Day 2 Midgets: POWRi Lightning Sprints: POWRi Minn-Kota Lightning Sprints 360 Sprints - Non-Winged, 600cc Modifieds, Sport Compact, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Pure Stock, WISSOTA Street Stock | Results | | Nathan Kilwine (600cc Modifieds) | 1st | - | - | 2nd |
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| 10/1/2021 | Cedar County Raceway - Tipton, IA Hoker Trucking Darkside Fall Bash 600cc Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Nathan Kilwine (600cc Modifieds) | 1st | - | - | 1st |
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| 10/16/2021 | Mason City Motor Speedway - Mason City, IA Five Star Classic 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Nathan Kilwine (600cc Modifieds) | 1st | - | - | 2nd |
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| 10/17/2021 | Mason City Motor Speedway - Mason City, IA Five Star Classic 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Nathan Kilwine (600cc Modifieds) | 3rd | - | - | 13th |
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| 10/23/2021 | Mason City Motor Speedway - Mason City, IA Inaugural Micro Nationals Winged A-Class, 600cc Modifieds, Dirt Mini Late Models, Mod Lites | Canceled |