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| 2/20/2021 | Kings Speedway - Hanford, CA Opening Night 360 Sprints - Winged, 305 Sprints - Winged, Asphalt Mini Stocks, Stock Cars, Lightning Sprints | Results | | Colby Thornhill (360 Sprints - Winged) | 5th | - | - | 22nd |
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| 3/12/2021 | Kings Speedway - Hanford, CA Night # 1 360 Sprints - Winged, Stock Cars | Results | | Colby Thornhill (360 Sprints - Winged) | 3rd | - | - | 21st (DNF) |
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| 3/13/2021 | Kings Speedway - Hanford, CA 360 Sprints - Winged: ASCS National Factory Stocks, Asphalt Mini Stocks, Lightning Sprints | Results | | Colby Thornhill (360 Sprints - Winged) | 4th | - | 3rd | - |
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| 3/19/2021 | Devil's Bowl Speedway - Mesquite, TX 360 Sprints - Winged: ASCS National with ASCS Lone Star Region 305 Sprints - Winged, USRA Modifieds, USRA Factory Stocks | Results | | Colby Thornhill (360 Sprints - Winged) | 1st | - | 1st | 12th |
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| 3/20/2021 | Devil's Bowl Speedway - Mesquite, TX 360 Sprints - Winged: ASCS National with ASCS Lone Star Region 305 Sprints - Winged, USRA Limited Mods, Dirt Big Block Modifieds | Results | | Colby Thornhill (360 Sprints - Winged) | 3rd | - | - | 15th |
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| 4/2/2021 | Lake Ozark Speedway - Eldon, MO 360 Sprints - Winged: ASCS Sooner Region with ASCS Warrior Region Non-Winged Sprints: POWRi WAR Sprints | Results | | Colby Thornhill (360 Sprints - Winged) | 5th | - | 2nd | 9th |
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| 4/3/2021 | Lake Ozark Speedway - Eldon, MO LOS Spring Nationals 360 Sprints - Winged: ASCS Sooner Region with ASCS Warrior Region Non-Winged Sprints: POWRi WAR Sprints Midgets, Dirt Super Late Models | Results | | Colby Thornhill (360 Sprints - Winged) | 2nd | - | - | 20th |
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| 4/17/2021 | Park Jefferson International Speedway - Jefferson, SD Lucas Oil ASCS and RACESaver Sioux City Sprint Nationals plus IMCA Modifieds& Stock Cars 360 Sprints - Winged: ASCS National IMCA Modified, IMCA Stock Car, IMCA RaceSaver Sprint Car | Results | | Colby Thornhill (360 Sprints - Winged) | 4th | - | - | 12th |
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| 5/1/2021 | Selinsgrove Speedway - Selinsgrove, PA 360 Sprints - Winged: ASCS National with United Racing Club 410 Sprints - Winged | Results | | Colby Thornhill (360 Sprints - Winged) | 1st | - | - | 15th |
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| 5/2/2021 | BAPS Motor Speedway - York Haven, PA Select Collision Kevin Gobrecht Classic ($5 off GA to ALL Fans Wearing a Kevin Gobrecht T-Shirt) 410 Sprints - Winged, Supermodifieds | Results | | Colby Thornhill (410 Sprints - Winged) | DNS | - | DNS | - |
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| 5/7/2021 | I-96 Speedway - Lake Odessa, MI 360 Sprints - Winged: ASCS National with GLSS-Great Lakes Super Sprints 410 Sprints - Non-Winged: Great Lakes Traditional Sprints with BOSS Buckeye Outlaw Sprint Series | Rain Out |
| 5/8/2021 | I-96 Speedway - Lake Odessa, MI 360 Sprints - Winged: ASCS National with GLSS-Great Lakes Super Sprints 410 Sprints - Non-Winged: Great Lakes Traditional Sprints with BOSS Buckeye Outlaw Sprint Series | Results | | Colby Thornhill (360 Sprints - Winged) | 1st | - | - | 13th |
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| 5/15/2021 | Volunteer Speedway - Bulls Gap, TN 360 Sprints - Winged: ASCS National | Results | | Colby Thornhill (360 Sprints - Winged) | 4th | - | - | 6th |
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| 5/21/2021 | Tri City Speedway - Granite City, IL 360 Sprints - Winged: ASCS National with ASCS Warrior Region DIRTcar UMP Modifieds, B Modifieds | Results | | Colby Thornhill (360 Sprints - Winged) | 6th | - | - | 10th |
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| 5/29/2021 | Lake Ozark Speedway - Eldon, MO 1st Annual Memorial Nationals 360 Sprints - Winged: ASCS National with ASCS Warrior Region Midgets: POWRi National Midgets with POWRi Non-Winged Sprints: POWRi WAR Sprints | Results | | Colby Thornhill (360 Sprints - Winged) | 5th | - | 13th (DNF) | 26th (DNF) |
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| 5/30/2021 | Lake Ozark Speedway - Eldon, MO 1st Annual Memorial Nationals 360 Sprints - Winged: ASCS National with ASCS Warrior Region Midgets: POWRi National Midgets with POWRi | Results | | Colby Thornhill (360 Sprints - Winged) | 10th (DNF) | - | 10th | 13th |
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| 6/12/2021 | Skagit Speedway - Burlington, WA ROUND 8 360 Sprints - Winged, Sportsman Sprints, Economy Midgets, Hornets | Results | | Colby Thornhill (360 Sprints - Winged) | 5th | - | - | 10th |
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| 6/19/2021 | Grays Harbor Raceway - Elma, WA 360 Sprints - Winged: ASCS National Economy Midgets, Dwarf | Results | | Colby Thornhill (360 Sprints - Winged) | 2nd | - | - | 11th |
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| 6/20/2021 | Grays Harbor Raceway - Elma, WA ASCS NATIONAL TOUR/BROWNFIELD CLASSIC 360 Sprints - Winged: ASCS National Economy Midgets, Dwarf | Results | | Colby Thornhill (360 Sprints - Winged) | 5th | - | 3rd | 18th |
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| 6/24/2021 | Skagit Speedway - Burlington, WA DIRT CUP - Presented by The Skagit Casino Resort 360 Sprints - Winged: ASCS National Economy Midgets | Results | | Colby Thornhill (360 Sprints - Winged) | 1st | - | - | 14th |
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| 6/25/2021 | Skagit Speedway - Burlington, WA DIRT CUP - Presented by The Skagit Casino Resort 360 Sprints - Winged: ASCS National Economy Midgets | Results | | Colby Thornhill (360 Sprints - Winged) | 1st | - | - | 17th |
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| 6/26/2021 | Skagit Speedway - Burlington, WA DIRT CUP - Presented by The Skagit Casino Resort 360 Sprints - Winged: ASCS National Economy Midgets | Results | | Colby Thornhill (360 Sprints - Winged) | - | - | 1st | 13th |
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| 7/9/2021 | Gallatin Speedway - Belgrade, MT 360 Sprints - Winged: ASCS National with ASCS Frontier Region WISSOTA Street Stock | Results | | Colby Thornhill (360 Sprints - Winged) | 5th | - | - | 8th |
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| 7/10/2021 | Gallatin Speedway - Belgrade, MT 360 Sprints - Winged: ASCS National with ASCS Frontier Region WISSOTA Super Stock | Results | | Colby Thornhill (360 Sprints - Winged) | 2nd | - | - | 10th |
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| 7/16/2021 | US 36 Raceway - Osborn, MO 360 Sprints - Winged: ASCS National with ASCS Warrior Region Stock Cars, Pure Stock | Results | | Colby Thornhill (360 Sprints - Winged) | DNS | - | - | 23rd (DNF) |
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| 7/23/2021 | Batesville Motor Speedway - Locust Grove, AR ASCS Sprint Week - Night 1 360 Sprints - Winged: ASCS National with ASCS Mid-South Region | Results | | Colby Thornhill (360 Sprints - Winged) | 1st | - | - | 4th |
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| 7/24/2021 | I-30 Speedway - Little Rock, AR ASCS Sprint Week - Night 2 360 Sprints - Winged: ASCS National with ASCS Mid-South Region | Results | | Colby Thornhill (360 Sprints - Winged) | 6th | - | 14th | 10th |
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| 7/25/2021 | Riverside International Speedway - West Memphis, AR ASCS Sprint Week - Night 3 360 Sprints - Winged: ASCS National Stock Cars, Dirt Late Models | Results | | Colby Thornhill (360 Sprints - Winged) | 7th | - | 2nd | 17th |
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| 7/27/2021 | Creek County Speedway - Sapulpa, OK ASCS Sprint Week - Night 4 360 Sprints - Winged: ASCS National Champ 360 Sprints - Winged | Results | | Colby Thornhill (360 Sprints - Winged) | 6th | - | 3rd | 16th |
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| 7/28/2021 | Caney Valley Speedway - Caney, KS ASCS Sprint Week - Night 5 360 Sprints - Winged: ASCS National Factory Stocks, Pure Stock, USRA B-Mods, USRA Tuners | Results | | Colby Thornhill (360 Sprints - Winged) | 4th | - | - | 12th |
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| 7/29/2021 | 81 Speedway - Park City, KS ASCS Sprint Week - Night 6 360 Sprints - Winged: ASCS National Stock Cars, USRA B-Mods | Results | | Colby Thornhill (360 Sprints - Winged) | 6th | - | - | 20th |
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| 7/30/2021 | Tulsa Speedway - Tulsa, OK ASCS Sprint Week - Night 7 360 Sprints - Winged: ASCS National with ASCS Sooner Region Factory Stocks, Lightning Sprints, Pony Stock, USRA B-Mods | Results | | Colby Thornhill (360 Sprints - Winged) | 8th | - | - | 13th |
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| 7/31/2021 | Outlaw Motor Speedway - Oktaha, OK ASCS Sprint Week - Night 8 360 Sprints - Winged: ASCS National Sprint Cars, Factory Stocks, USRA B-Mods, USRA Modifieds | Results | | Colby Thornhill (360 Sprints - Winged) | 3rd | - | - | 8th |
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| 8/3/2021 | Lakeside Speedway - Kansas City, KS 360 Sprints - Winged: ASCS National with ASCS Warrior Region Stock Cars, B Modifieds, Mod Lites | Results | | Colby Thornhill (360 Sprints - Winged) | 4th | - | - | 15th |
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| 8/5/2021 | Knoxville Raceway - Knoxville, IA 31st Annual ASCS 360 Knoxville Nationals 360 Sprints - Winged: ASCS National 410 Sprints - Winged, Winged Sprints | Results | | Colby Thornhill (360 Sprints - Winged) | - | - | - | - |
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| 8/7/2021 | Knoxville Raceway - Knoxville, IA 31st Annual ASCS 360 Knoxville Nationals 360 Sprints - Winged: ASCS National 410 Sprints - Winged, Winged Sprints | Results | | Colby Thornhill (360 Sprints - Winged) | - | - | - | - |
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| 8/13/2021 | Sweetwater Speedway - Rock Springs, WY Sprint Car Sprintacular 360 Sprints - Winged: ASCS Frontier Region A Modifieds, B Modifieds, Street Stocks, 250 yamaha, Asphalt Street Stocks, Generic 1, Generic 2 | Results | | Colby Thornhill (360 Sprints - Winged) | 1st | - | - | 1st |
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| 8/14/2021 | Sweetwater Speedway - Rock Springs, WY Sprint Car Sprintacular 360 Sprints - Winged: ASCS Frontier Region A Modifieds, B Modifieds, Street Stocks, 250 yamaha, Asphalt Street Stocks, Generic 1, Generic 2 | Results | | Colby Thornhill (360 Sprints - Winged) | 2nd | - | - | 6th |
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| 8/28/2021 | Skagit Speedway - Burlington, WA ROUND 21 - BICYCLE EXTRAVAGANZA 360 Sprints - Winged, Sportsman Sprints, A Modifieds | Results | | Colby Thornhill (360 Sprints - Winged) | 4th | - | - | 6th |
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| 10/16/2021 | Red Bluff Outlaws - Red Bluff, CA Points Race #1 Restricted Box Stock, Unrestricted Box Stock, 250 Winged Outlaw, 500 Winged Open Outlaw Heavy, 500 Winged Open Outlaw, Open Dirt Karts | Results | | Colby Thornhill (500 Winged Open Outlaw) | 4th | - | 10th | - |
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| 10/21/2021 | Thunderbowl Raceway - Tulare, CA Trophy Cup Night #1 360 Sprints - Winged | Results | | Colby Thornhill (360 Sprints - Winged) | 2nd | - | 15th | - |
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| 10/22/2021 | Thunderbowl Raceway - Tulare, CA Trophy Cup Night #2 360 Sprints - Winged | Results | | Colby Thornhill (360 Sprints - Winged) | 7th | - | 14th | - |
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| 10/23/2021 | Thunderbowl Raceway - Tulare, CA Trophy Cup Night #3 360 Sprints - Winged | Results | | Colby Thornhill (360 Sprints - Winged) | 7th | - | - | - |
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| 11/6/2021 | Stockton Dirt Track - Stockton, CA Tribute to Gary Patterson 360 Sprints - Winged: Sprint Car Challenge Tour 410 Sprints - Winged: NARC King of the West Sprints | Results | | Colby Thornhill (360 Sprints - Winged) | 4th | - | - | 12th |
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| 11/12/2021 | Kings Speedway - Hanford, CA TULARE - KINGS OF THUNDER 360 (NOV 12) 360 Sprints - Winged: Kings of Thunder | Results | | Colby Thornhill (360 Sprints - Winged) | - | - | - | 15th |
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| 11/12/2021 | Thunderbowl Raceway - Tulare, CA Kings of Thunder 360 Sprints - Winged, 305 Sprints - Winged, Dirt Mini Stocks | Results | | Colby Thornhill (360 Sprints - Winged) | 5th | - | - | 15th |
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| 11/13/2021 | Kings Speedway - Hanford, CA Fall Classic 360 Sprints - Winged: Kings of Thunder 305 Sprints - Winged, Asphalt Mini Stocks | Results | | Colby Thornhill (360 Sprints - Winged) | - | - | - | - |
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| 11/14/2021 | Kings Speedway - Hanford, CA REFUND 360 Sprints - Winged, 305 Sprints - Winged, Asphalt Mini Stocks | Results | | Colby Thornhill (360 Sprints - Winged) | - | - | - | - |
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| 11/19/2021 | Cocopah Speedway - Somerton, AZ 360 Sprints - Winged: ASCS Southwest Region Kid Karts Dirt, Junior Sportsman Dirt Karts, IMCA Northern SportMod, IMCA Hobby Stock, IMCA Sport Compact | Results | | Colby Thornhill (360 Sprints - Winged) | 3rd | - | - | 10th |
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| 11/20/2021 | Cocopah Speedway - Somerton, AZ 360 Sprints - Winged: ASCS Southwest Region Kid Karts Dirt, Junior Sportsman Dirt Karts, IMCA Northern SportMod, IMCA Hobby Stock, IMCA Sport Compact | Results | | Colby Thornhill (360 Sprints - Winged) | 2nd | - | - | 9th |
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| 11/26/2021 | Arizona Speedway - Queen Creek, AZ 360 Sprints - Winged: ASCS Southwest Region Non-Winged Sprints: San Tan Ford ASCS Desert Sprint Car Series | Results | | Colby Thornhill (360 Sprints - Winged) | 4th | - | 1st | 11th | | Colby Thornhill (Non-Winged Sprints) | - | - | - | - |
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| 11/27/2021 | Arizona Speedway - Queen Creek, AZ 360 Sprints - Winged: ASCS Southwest Region Non-Winged Sprints: San Tan Ford ASCS Desert Sprint Car Series | Results | | Colby Thornhill (360 Sprints - Winged) | 4th | - | 2nd | 12th |
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