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| 5/7/2021 | Casper Speedway - Casper, WY IMCA Modified Showdown Sponsored by Chuck's Bait Stock Cars, Vintage Modifieds, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Mod Four | Results | | Heather Mertens (WISSOTA Midwest Mods) | 5th (DNF) | - | - | 22nd (DNF) |
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| 5/22/2021 | Gillette Thunder Speedway - Gillette, WY $ Month of Money $ Series IMCA Modified, IMCA Hobby Stock, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Late Model | Results | | Heather Mertens (WISSOTA Midwest Mods) | 4th | - | - | 13th |
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| 5/29/2021 | Gillette Thunder Speedway - Gillette, WY $ Month of Money $ Series IMCA Modified, IMCA Hobby Stock, WISSOTA Midwest Mods, WISSOTA Mod Four | Results | | Heather Mertens (WISSOTA Midwest Mods) | 4th | - | - | DNS |
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| 6/19/2021 | Gillette Thunder Speedway - Gillette, WY WISSOTA Mod 4 Black Jack Special IMCA Modified, IMCA Hobby Stock, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Late Model | Results | | Heather Mertens (WISSOTA Midwest Mods) | 5th | - | - | 14th |
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| 7/10/2021 | Gillette Thunder Speedway - Gillette, WY WISSOTA Midwest Mod Border Clash IMCA Modified, IMCA Hobby Stock, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Late Model | Results | | Heather Mertens (WISSOTA Midwest Mods) | 5th (DNF) | - | - | 21st (DNF) |
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| 7/31/2021 | Gillette Thunder Speedway - Gillette, WY Regular Race Sport Compact, IMCA Modified, IMCA Hobby Stock, WISSOTA Midwest Mods, WISSOTA Mod Four | Results | | Heather Mertens (WISSOTA Midwest Mods) | 4th | 3rd | - | 14th |
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| 8/21/2021 | Gillette Thunder Speedway - Gillette, WY Points Championship Night WISSOTA R.O.C Sport Compact, IMCA Modified, IMCA Hobby Stock, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Late Model | Results | | Heather Mertens (WISSOTA Midwest Mods) | 4th | - | - | 16th |
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| 9/3/2021 | Gillette Thunder Speedway - Gillette, WY 21ST ANNUAL EAST-WEST CLASH IMCA Modified, IMCA Hobby Stock, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Late Model, WISSOTA Street Stock | Results | | Heather Mertens (WISSOTA Midwest Mods) | 5th | - | 12th (DNF) | - |
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| 9/4/2021 | Gillette Thunder Speedway - Gillette, WY 21ST ANNUAL EAST-WEST CLASH Sport Compact, IMCA Modified, IMCA Hobby Stock, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Late Model, WISSOTA Street Stock | Results | | Heather Mertens (WISSOTA Midwest Mods) | 9th | - | 10th | - |
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| 9/5/2021 | Gillette Thunder Speedway - Gillette, WY 21ST ANNUAL EAST-WEST CLASH CHAMPIONSHIP Sport Compact, IMCA Modified, IMCA Hobby Stock, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Late Model, WISSOTA Street Stock | Results | | Heather Mertens (WISSOTA Midwest Mods) | 7th | 3rd | 10th | - |
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| 9/11/2021 | Big Sky Speedway - Billings, MT Big Sky Speedway & Stagg Motor Sports with Live Music featuring "The Repeat Offenders". 360 Sprints - Winged: ASCS Frontier Region IMCA Sport Compact, WISSOTA Midwest Mods | Results | | Heather Mertens (WISSOTA Midwest Mods) | 7th | - | - | 10th |
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