The 2025 Iowa Corn 350 is an upcoming NASCAR Cup Series race that will be held on August 3, 2025, at Iowa Speedway in Newton, Iowa. Contested over 350 laps on the D-shaped oval, it will be the 23rd race of the 2025 NASCAR Cup Series season. Report. Background. Iowa Speedway is a 7/8-mile (1.4 km) paved oval motor racing track in Newton, Iowa, United States, approximately east of Des Moines. The track was designed with influence from Rusty Wallace and patterned after Richmond Raceway, a short track where Wallace was very successful. It has over 25,000 permanent seats as well as a unique multi-tiered Recreational Vehicle viewing area along the backstretch. Media. Television. USA will cover the race on the television side. Leigh Diffey, Jeff Burton, and Steve Letarte will call the race from the broadcast booth. TBA handled the pit road duties from pit lane. Radio. Radio coverage of the race will be broadcast by Motor Racing Network (MRN) and will be simulcast on Sirius XM NASCAR Radio.