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| 5/4/2018 | Rapid Speedway - Rock Rapids, IA Weekly Racing Series + MSTS 360 Sprints 360 Sprints - Winged: Midwest Sprint Touring Series DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds | Results | | Marni DeBoer (DIRTcar Sportsmans) | 2nd | - | - | 3rd |
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| 5/18/2018 | Rapid Speedway - Rock Rapids, IA Weekly Racing Series + MSTS 360 Sprints 360 Sprints - Winged: Midwest Sprint Touring Series DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds | Results | | Marni DeBoer (DIRTcar Sportsmans) | 7th (DNF) | - | - | DNS |
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| 5/25/2018 | Rapid Speedway - Rock Rapids, IA Weekly Racing Series + SLMR Dirt Super Late Models: SLMR Late Model Series DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds | Results | | Marni DeBoer (DIRTcar Sportsmans) | 1st | - | - | 3rd |
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| 6/1/2018 | Rapid Speedway - Rock Rapids, IA Weekly Racing Series + Ironman B-Mods & Stock Cars + LMSS DIRTcar Late Models, DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds | Results | | Marni DeBoer (DIRTcar Sportsmans) | 1st | - | - | 4th |
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| 6/15/2018 | Rapid Speedway - Rock Rapids, IA Weekly Racing Series + Tri State Late Models Dirt Late Models: Tri-State Late Models DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds, Economy Late Models | Results | | Marni DeBoer (DIRTcar Sportsmans) | 2nd | - | - | 4th |
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| 6/29/2018 | Rapid Speedway - Rock Rapids, IA Mid Season Championship DIRTcar Late Models, DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds | Results | | Marni DeBoer (DIRTcar Sportsmans) | 6th (DNF) | - | - | DNS |
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| 7/6/2018 | Rapid Speedway - Rock Rapids, IA Weekly Racing Series DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds | Results | | Marni DeBoer (DIRTcar Sportsmans) | 1st | - | - | 5th |
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| 7/20/2018 | Rapid Speedway - Rock Rapids, IA Weekly Racing Series DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds | Results | | Marni DeBoer (DIRTcar Sportsmans) | 3rd | - | - | 4th |
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| 7/27/2018 | Rapid Speedway - Rock Rapids, IA Weekly Racing Series DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds | Results | | Marni DeBoer (DIRTcar Sportsmans) | 2nd | - | - | 12th (DNF) |
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| 8/3/2018 | Rapid Speedway - Rock Rapids, IA Weekly Racing Series + LMSS DIRTcar Late Models, DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds | Results | | Marni DeBoer (DIRTcar Sportsmans) | 4th | - | - | 3rd |
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| 8/10/2018 | Rapid Speedway - Rock Rapids, IA Weekly Racing Series DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds | Results | | Marni DeBoer (DIRTcar Sportsmans) | 3rd | - | - | 3rd |
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| 8/31/2018 | Rapid Speedway - Rock Rapids, IA Season Championship DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds | Results | | Marni DeBoer (DIRTcar Sportsmans) | 1st | - | - | 3rd |
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| 9/14/2018 | Rapid Speedway - Rock Rapids, IA Rapid Nationals Night #1 360 Sprints - Winged: Midwest Sprint Touring Series DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds | Results | | Marni DeBoer (DIRTcar Sportsmans) | 4th | - | - | 1st |
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| 9/15/2018 | Rapid Speedway - Rock Rapids, IA Rapid Nationals Night #2 Dirt Late Models: Tri-State Late Models DIRTcar Late Models, DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds | Results | | Marni DeBoer (DIRTcar Sportsmans) | 3rd | - | - | 3rd |
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