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| 5/5/2018 | Miller Central Speedway - Miller, SD Season Opener- Quoin Financial Bank Pure Stock, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Grohs (WISSOTA Midwest Mods) | 4th | - | - | 8th |
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| 5/19/2018 | Miller Central Speedway - Miller, SD Miller Central Speedway Pure Stock, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Grohs (WISSOTA Midwest Mods) | 7th | - | - | 19th (DNF) |
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| 5/25/2018 | Miller Central Speedway - Miller, SD Miller Central Speedway Pure Stock, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Grohs (WISSOTA Midwest Mods) | 6th | - | - | 15th (DNF) |
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| 5/26/2018 | Miller Central Speedway - Miller, SD Miller Central Speedway Pure Stock, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Grohs (WISSOTA Midwest Mods) | 1st | - | - | 22nd (DNF) |
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| 6/2/2018 | Dakota State Fair Speedway - Huron, SD Prostrollo General Motors Challenge Cup XVIII - $10,000 to win WISSOTA Late Model Challenge Series WISSOTA Late Model: Wissota Late Model Challenge Series Midwest Modifieds, WISSOTA Midwest Mods | Results | | Tanner Grohs (WISSOTA Midwest Mods) | 5th | - | - | 19th (DNF) |
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| 6/9/2018 | Miller Central Speedway - Miller, SD Miller Central Speedway-ROC Race Pure Stock, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Grohs (WISSOTA Midwest Mods) | 5th (DNF) | - | - | 10th (DNF) |
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| 6/16/2018 | Miller Central Speedway - Miller, SD Miller Central Speedway Pure Stock, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Rain Out |
| 6/30/2018 | Miller Central Speedway - Miller, SD Miller Central Speedway Pure Stock, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Grohs (WISSOTA Midwest Mods) | 1st | - | - | 15th |
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| 7/7/2018 | Miller Central Speedway - Miller, SD Miller Central Speedway Pure Stock, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Grohs (WISSOTA Midwest Mods) | 4th | - | - | 18th (DNF) |
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| 7/14/2018 | Miller Central Speedway - Miller, SD Miller Central Speedway Pure Stock, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Grohs (WISSOTA Midwest Mods) | 5th | - | - | 14th |
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| 7/20/2018 | Wagner Speedway - Wagner, SD WS Hobby Stocks, B Modifieds, Dirt Late Models, Sport Compact, WISSOTA Super Stock | Results | | Tanner Grohs (B Modifieds) | 6th | - | - | 5th |
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| 7/28/2018 | Miller Central Speedway - Miller, SD Miller Central Speedway Special A Modifieds, Pure Stock, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Grohs (WISSOTA Midwest Mods) | 5th | - | - | 11th |
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| 8/11/2018 | Miller Central Speedway - Miller, SD Miller Central Speedway Pure Stock, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Grohs (WISSOTA Midwest Mods) | 6th (DNF) | - | - | DNS |
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| 8/17/2018 | Miller Central Speedway - Miller, SD Miller Central Speedway Two Day Special Pure Stock, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Grohs (WISSOTA Midwest Mods) | 4th (DNF) | - | - | 16th |
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| 8/18/2018 | Miller Central Speedway - Miller, SD Miller Central Speedway Two Day Special & Track Championship Pure Stock, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Grohs (WISSOTA Midwest Mods) | 8th | - | - | 21st (DNF) |
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| 9/8/2018 | Miller Central Speedway - Miller, SD Miller Central Speedway Pure Stock, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Grohs (WISSOTA Midwest Mods) | 8th | - | - | 11th |
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| 9/22/2018 | Casino Speedway - Watertown, SD Autumn Classic - Going for the Good's - Night #1 Economy Late Models, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Grohs (WISSOTA Midwest Mods) | 8th | - | 5th (DNF) | - |
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