NASCAR Cup Series 2025 23 2025-08-03 2025-08-03 https://r2.thesportsdb.com/images/media/event/thumb/njxkdc1707481909.jpg https://r2.thesportsdb.com/images/media/event/poster/rpxpq21707481709.jpg The Iowa Corn 350 powered by Ethanol is a NASCAR Cup Series stock car race held at Iowa Speedway in Newton, Iowa. It was NASCAR Cup Series' first race at Iowa Speedway and first race in the state of Iowa. Ryan Blaney is the defending race winner, having won it in 2024. 2185873