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| 5/19/2018 | Hamilton County Speedway - Webster City, IA Weekly Racing Dirt Super Late Models, Dirt Pro Trucks, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Ryan Griffith (Dirt Super Late Models) | - | - | - | 5th |
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| 6/2/2018 | Hamilton County Speedway - Webster City, IA Weekly Racing Dirt Super Late Models, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Ryan Griffith (Dirt Super Late Models) | - | - | - | 4th |
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| 6/9/2018 | Hamilton County Speedway - Webster City, IA Weekly Racing Dirt Super Late Models, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Ryan Griffith (Dirt Super Late Models) | - | - | - | 8th |
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| 6/16/2018 | Hamilton County Speedway - Webster City, IA Weekly Racing Dirt Super Late Models, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Ryan Griffith (Dirt Super Late Models) | 5th | - | - | 3rd |
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| 6/23/2018 | Hamilton County Speedway - Webster City, IA Weekly Racing Dirt Super Late Models, Dirt Pro Trucks, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Ryan Griffith (Dirt Super Late Models) | 7th | - | - | 5th |
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| 7/7/2018 | Hamilton County Speedway - Webster City, IA Weekly Racing Dirt Super Late Models, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Ryan Griffith (Dirt Super Late Models) | 1st | - | - | 3rd |
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| 7/14/2018 | Hamilton County Speedway - Webster City, IA Weekly Racing Dirt Super Late Models, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Ryan Griffith (Dirt Super Late Models) | 1st | - | - | 2nd |
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| 7/21/2018 | Hamilton County Speedway - Webster City, IA Weekly Racing Dirt Super Late Models, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Ryan Griffith (Dirt Super Late Models) | 2nd | - | - | 1st |
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| 7/25/2018 | Hamilton County Speedway - Webster City, IA Wild Card Wednesday Dirt Super Late Models, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Ryan Griffith (Dirt Super Late Models) | 3rd | - | - | 11th |
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| 9/15/2018 | Knoxville Raceway - Knoxville, IA The Road to Knoxville Dirt Super Late Models: SLMR Late Model Series with Lucas Oil Late Model Dirt Series | Results | | Ryan Griffith (Dirt Super Late Models) | 3rd | - | - | 10th |
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