| | Heat | Dash | B Feature | A Feature |
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| 4/3/2021 | Grayson County Speedway - Bells, TX Opening Night / Full Program Factory Stocks, Hobby Stocks, 600cc Modifieds, IMCA Modified, IMCA Southern SportMod | Results | | Marilyn Williams (600cc Modifieds) | 4th | - | - | 6th |
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| 4/10/2021 | Grayson County Speedway - Bells, TX Race Program / Toms Outlaw Modified Series A Modifieds: TOMS - Touring Outlaw Modified Series Factory Stocks, Hobby Stocks, 600cc Modifieds, IMCA Southern SportMod | Results | | Marilyn Williams (600cc Modifieds) | 3rd | - | - | 8th |
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| 5/8/2021 | Grayson County Speedway - Bells, TX Race Program / TSS Sprints 305 Sprints - Winged: IMCA RaceSaver Sprints Factory Stocks, Hobby Stocks, 600cc Modifieds, IMCA Southern SportMod, IMCA RaceSaver Sprint Car | Results | | Marilyn Williams (600cc Modifieds) | 2nd | - | - | 7th |
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| 5/15/2021 | Grayson County Speedway - Bells, TX Race Program Factory Stocks, Hobby Stocks, 600cc Modifieds, IMCA Modified, IMCA Southern SportMod | Results | | Marilyn Williams (600cc Modifieds) | 3rd | - | - | 9th |
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| 6/19/2021 | Grayson County Speedway - Bells, TX Race Program / Topless Mods Factory Stocks, Hobby Stocks, 600cc Modifieds, Limited Modified, IMCA Southern SportMod | Results | | Marilyn Williams (600cc Modifieds) | 2nd | - | - | 7th |
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| 6/26/2021 | Grayson County Speedway - Bells, TX Full Program Factory Stocks, Hobby Stocks, 600cc Modifieds, IMCA Modified, IMCA Southern SportMod | Results | | Marilyn Williams (600cc Modifieds) | 4th | - | - | 4th |
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| 7/3/2021 | Grayson County Speedway - Bells, TX Race Program / Firework Show Factory Stocks, Hobby Stocks, Street Stocks, 600cc Modifieds, IMCA Southern SportMod | Results | | Marilyn Williams (600cc Modifieds) | 3rd | - | - | 8th |
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| 7/10/2021 | Grayson County Speedway - Bells, TX Full Program Factory Stocks, Hobby Stocks, 600cc Modifieds, IMCA Modified, IMCA Southern SportMod | Results | | Marilyn Williams (600cc Modifieds) | 3rd | - | - | 15th (DNF) |
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| 7/24/2021 | Grayson County Speedway - Bells, TX Full Program Factory Stocks, Hobby Stocks, 600cc Modifieds, IMCA Modified, IMCA Southern SportMod | Results | | Marilyn Williams (600cc Modifieds) | 2nd | - | - | 7th |
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| 7/31/2021 | Grayson County Speedway - Bells, TX Race Program / TBA Factory Stocks, Hobby Stocks, B Modifieds, 600cc Modifieds, IMCA Southern SportMod | Results | | Marilyn Williams (600cc Modifieds) | 5th | - | - | 6th |
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| 8/7/2021 | Grayson County Speedway - Bells, TX Full Program Factory Stocks, Hobby Stocks, 600cc Modifieds, IMCA Modified, IMCA Southern SportMod | Results | | Marilyn Williams (600cc Modifieds) | 2nd | - | - | 14th (DNF) |
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| 8/21/2021 | Grayson County Speedway - Bells, TX Full Program Factory Stocks, Hobby Stocks, 600cc Modifieds, IMCA Modified, IMCA Southern SportMod | Results | | Marilyn Williams (600cc Modifieds) | 4th | - | - | 11th |
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| 9/4/2021 | Grayson County Speedway - Bells, TX Full Program Non - IMCA Mod Points Night Factory Stocks, Hobby Stocks, 600cc Modifieds, IMCA Modified, IMCA Southern SportMod | Results | | Marilyn Williams (600cc Modifieds) | 5th | - | - | 10th |
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| 9/11/2021 | Grayson County Speedway - Bells, TX Race Program / TSS Sprints Factory Stocks, Hobby Stocks, 600cc Modifieds, IMCA Southern SportMod, IMCA RaceSaver Sprint Car | Results | | Marilyn Williams (600cc Modifieds) | 3rd | - | - | 9th |
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| 9/18/2021 | Grayson County Speedway - Bells, TX Full Program Factory Stocks, Hobby Stocks, 600cc Modifieds, IMCA Modified, IMCA Southern SportMod | Results | | Marilyn Williams (600cc Modifieds) | 2nd | - | - | 9th |
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| 9/25/2021 | Grayson County Speedway - Bells, TX Race Program / Toms - Touring Outlaw Modified Series A Modifieds: TOMS - Touring Outlaw Modified Series Factory Stocks, Hobby Stocks, 600cc Modifieds, IMCA Southern SportMod | Results | | Marilyn Williams (600cc Modifieds) | 4th | - | - | 7th |
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| 10/1/2021 | Kennedale Speedway Park - Kennedale, TX 15th ANNUAL SUMMIT EQUIPMENT SHOWDOWN Factory Stocks, B Modifieds, IMCA Modified, IMCA Southern SportMod, IMCA Stock Car, IMCA Sport Compact | Postponed |