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| 5/2/2021 | Granite City Motor Park - Sauk Rapids, MN Opening Night Races WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Mark Rein (WISSOTA Street Stock) | 5th | - | - | 10th |
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| 5/9/2021 | Granite City Motor Park - Sauk Rapids, MN Mother's Day Special with Micro Sprints 600cc Winged Micros, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Mark Rein (WISSOTA Street Stock) | 5th | - | - | 8th |
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| 5/16/2021 | Granite City Motor Park - Sauk Rapids, MN Kid's Night - Bicycle Giveaway WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Mark Rein (WISSOTA Street Stock) | 5th | - | - | 10th |
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| 5/23/2021 | Granite City Motor Park - Sauk Rapids, MN Regular Night with MWM Special - WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Mark Rein (WISSOTA Street Stock) | 5th | - | - | 9th |
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| 6/12/2021 | Ogilvie Raceway - Ogilvie, MN Saturday Night Shootout WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Street Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Mark Rein (WISSOTA Street Stock) | 7th | - | - | 13th |
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| 7/11/2021 | Granite City Motor Park - Sauk Rapids, MN RV Mod Tour and Street Stock Tour A Modifieds, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Street Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Mark Rein (WISSOTA Street Stock) | 6th | - | - | 21st (DNF) |
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| 7/18/2021 | Granite City Motor Park - Sauk Rapids, MN Regular Night Races with Modified Special $2K to win WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Mark Rein (WISSOTA Street Stock) | 8th (DNF) | - | - | 7th (DNF) |
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| 8/29/2021 | Granite City Motor Park - Sauk Rapids, MN Structural Buildings WISSOTA Late Model Challenge Series WISSOTA Late Model: Wissota Late Model Challenge Series A Modifieds, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Street Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Mark Rein (WISSOTA Street Stock) | 6th | - | - | 11th |
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