The NASCAR Cup Series (NCS) heads to Iowa Speedway in Newton, Iowa, for the Iowa Corn 350 Powered by Ethanol this Sunday, August 9 at 3:30 p.m. In 2025, William Byron led 141 laps and utilized a fuel strategy to win the Iowa Corn 350 at Iowa Speedway. NASCAR Cup Series (NCS), NASCAR O’Reilly Auto Parts Series (NOAPS), NASCAR Craftsman Truck Series (NCTS), ARCA Menards Series (AMS)Who and what should you look out for at Iowa Speedway? Blaney leads the NCS in laps led with 230 laps led (33% of his laps completed). The Driver Picks for the Iowa Corn 350 at Iowa Speedway