The third round of the 2015 Lucas Oil Pro Motocross Championship at Thunder Valley produced a huge shakeup in both classes. Eli Tomac and Marvin Musquin entered the race with 19-point leads in their respective classes, but thanks to crashes from both riders, two red plates changed hands at the day of the day. Ryan Dungey took advantage of Tomac's misfortunes to outduel Ken Roczen for the overall win and take over the 450 Class points lead. Meanwhile, the 250 Class was dominated by Jeremy Martin, who bounced back from last week's mishaps for a pair of wire-to-wire moto wins that put him back on top of the championship standings.
|Series||AMA Outdoor Motocross|
|Event||Thunder Valley National|
|Track||Thunder Valley Motocross Park|
|Drivers||Eli Tomac, Ryan Dungey, Marvin Musquin, Ken Roczen, Zach Osborne, Jeremy Martin|
|Tags||ama, lakewood, motocross, race highlights, sports, thunder valley|