Byron Wins Iowa Corn 350, Completes Track Trifecta

William Byron won the 2025 NASCAR Cup Series Iowa Corn 350 at Iowa Speedway, holding off Chase Briscoe and Brad Keselowski with a successful fuel mileage strategy for his 15th career Cup win. Byron led 141 of 350 laps and secured the regular season points lead with the victory, which also completed his career trifecta of winning at Iowa in the Cup, Xfinity, and Truck Series. The event featured 12 caution flags, tying a season high, and multiple late-race incidents that shaped the final outcome. Briscoe, who started on pole and finished second, expressed frustration over the difficulty of passing and called for a full repave of the track, amid uncertainty about Iowa's future on the Cup schedule. Brad Keselowski, Ryan Blaney, and Ryan Preece completed the top five, with Blaney finishing fourth as the defending winner. The race highlighted intense strategic battles and speculation about upcoming changes to the venue.