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| 4/4/2015 | Yakima Dirt Track - Yakima, WA Summer Thunder Sprint Tour at Yakima Fairgrounds 360 Sprints - Winged: Summer Thunder Series with Summer Thunder Sprint Series Sprint Cars, B Modifieds, Vintage Modifieds | Results | | Justin Youngquist (360 Sprints - Winged) | 5th | - | - | 18th | | Justin Youngquist (Sprint Cars) | 5th | - | - | 18th |
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| 4/18/2015 | Skagit Speedway - Burlington, WA 2015 SEASON OPENER! Dwayne Lane Auto Centers Racing Series A Modifieds: Washington Modified Tour 360 Sprints - Winged, 410 Sprints - Winged, Sportsman Sprints, Vintage Modifieds, Hornets | Results | | Justin Youngquist (360 Sprints - Winged) | 2nd | - | - | 19th |
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| 4/25/2015 | Grays Harbor Raceway - Elma, WA Season Opener Grays Harbor Racing Series 360 Sprints - Winged, Midgets, A Modifieds, Street Stocks, Hornets | Results | | Justin Youngquist (360 Sprints - Winged) | - | - | - | - |
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| 5/2/2015 | Skagit Speedway - Burlington, WA Summer Thunder Sprint Series presented by Here 2 Wire & Finishline Graphics 360 Sprints - Winged: Summer Thunder Series with Summer Thunder Sprint Series Sprint Cars, Midgets, A Modifieds | Results | | Justin Youngquist (360 Sprints - Winged) | 3rd | - | - | 7th | | Justin Youngquist (Sprint Cars) | 3rd | - | - | 7th |
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| 5/16/2015 | Skagit Speedway - Burlington, WA ROUND FIVE Dwayne Lane Auto Centers Racing Series A Modifieds: Washington Modified Tour 360 Sprints - Winged, Sportsman Sprints, Vintage Modifieds, Hornets | Results | | Justin Youngquist (360 Sprints - Winged) | 5th | - | - | 18th |
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| 5/23/2015 | Skagit Speedway - Burlington, WA JOHN CARROLL CLASSIC presented by IRI & HUGE FIREWORKS SHOW! 360 Sprints - Winged, 410 Sprints - Winged, Sportsman Sprints, Hornets | Results | | Justin Youngquist (360 Sprints - Winged) | 2nd | - | - | 17th |
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| 5/30/2015 | Skagit Speedway - Burlington, WA ROUND SEVEN Dwayne Lane Auto Centers Racing Series 360 Sprints - Winged, Midgets, Hornets | Results | | Justin Youngquist (360 Sprints - Winged) | 4th | - | - | 4th |
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| 6/6/2015 | Grays Harbor Raceway - Elma, WA Summer Thunder Sprintcar Series presented by Here 2 Wire 360 Sprints - Winged: Summer Thunder Series with Summer Thunder Sprint Series Street Stocks, Hornets | Results | | Justin Youngquist (360 Sprints - Winged) | 3rd | - | - | 15th |
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| 6/13/2015 | Skagit Speedway - Burlington, WA ROUND NINE Dwayne Lane Auto Centers Racing Series / Janicki Employee Night 360 Sprints - Winged, Sportsman Sprints, Street Stocks, Hornets | Results | | Justin Youngquist (360 Sprints - Winged) | 1st | - | - | 9th |
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| 6/20/2015 | Skagit Speedway - Burlington, WA ROUND TEN | Dwayne Lane Auto Centers Racing Series| STUNT SHOW 410 Sprints - Winged, Sportsman Sprints, Midgets | Results | | Justin Youngquist (410 Sprints - Winged) | 3rd | - | - | 5th |
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| 6/25/2015 | Skagit Speedway - Burlington, WA Jim Raper Memorial Dirt Cup 360 Sprints - Winged: ASCS National with Summer Thunder Series, Summer Thunder Sprint Series | Results | | Justin Youngquist (360 Sprints - Winged) | 6th | - | 9th | - |
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| 6/26/2015 | Skagit Speedway - Burlington, WA Jim Raper Memorial Dirt Cup 360 Sprints - Winged: ASCS National with Summer Thunder Series, Summer Thunder Sprint Series Midgets | Results | | Justin Youngquist (360 Sprints - Winged) | 4th | - | 2nd | 14th |
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| 6/27/2015 | Skagit Speedway - Burlington, WA Jim Raper Memorial Dirt Cup 360 Sprints - Winged: ASCS National with Summer Thunder Series, Summer Thunder Sprint Series A Modifieds: Washington Modified Tour Vintage Modifieds | Results | | Justin Youngquist (360 Sprints - Winged) | - | - | 5th | - |
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| 7/11/2015 | Skagit Speedway - Burlington, WA LES SCHWAB TIRES MIDSEASON CHAMPIONSHIPS & HUGE FIREWORKS EXTRAVAGANZA! 360 Sprints - Winged, 410 Sprints - Winged, Sportsman Sprints, A Modifieds, Hornets | Results | | Justin Youngquist (360 Sprints - Winged) | 4th | - | - | 4th |
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| 7/24/2015 | Skagit Speedway - Burlington, WA BOB'S BURGERS & BREW SUMMER NATIONALS | Preliminary Night 360 Sprints - Winged: Summer Thunder Series with Summer Thunder Sprint Series Hornets | Results | | Justin Youngquist (360 Sprints - Winged) | 1st | - | - | 2nd |
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| 7/25/2015 | Skagit Speedway - Burlington, WA BOB'S BURGERS & BREW SUMMER NATIONALS FINALE 360 Sprints - Winged: Summer Thunder Series with Summer Thunder Sprint Series Midgets, Hornets | Results | | Justin Youngquist (360 Sprints - Winged) | - | - | - | 20th |
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| 8/8/2015 | Skagit Speedway - Burlington, WA SILVER REEF HOTEL-CASINO-SPA LADIES NIGHT OUT 410 Sprints - Winged, Sportsman Sprints, Hornets | Results | | Justin Youngquist (410 Sprints - Winged) | 3rd | - | - | 2nd |
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| 9/5/2015 | Skagit Speedway - Burlington, WA Monster Meltdown 410 Sprints - Winged: World of Outlaws A Modifieds | Results | | Justin Youngquist (410 Sprints - Winged) | 6th | - | - | 22nd |
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| 9/19/2015 | Skagit Speedway - Burlington, WA SCRAP-IT SEASON CHAMPIONSHIPS & HUGE FIREWORKS SHOW! 360 Sprints - Winged, 410 Sprints - Winged, Sportsman Sprints, A Modifieds, Hornets | Results | | Justin Youngquist (410 Sprints - Winged) | - | 4th | - | 5th |
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