Welcome to the Racing America On SI Live Race Updates page for the 2025 NASCAR Cup Series Iowa Corn 350 Powered by Ethanol at Iowa Speedway. Be sure to refresh ...

William Byron used a flurry of cautions to stretch his fuel over the final 140 laps to win Sunday's NASCAR Cup Series race at Iowa Speedway.

William Byron took his second win of the 2025 NASCAR Cup Series season in dramatic fashion as he was running on fumes in the closing laps of Sunday's Iowa Corn ...

The Zane Smith Iowa Speedway incident escalated after a heated crash late in the Iowa Corn 350, when a crew member from Smith ...

For the second straight year a corn drawing behind Iowa Speedway welcomed visitors to the track in the middle of a corn field ...

Byron fought off fuel worries in the closing laps. He went the last 144 laps of the 350-lap race without a stop en route to ...

See which Cup Series drivers are on the upswing, plus those who had a rough night in Sunday's race at Iowa Speedway.

Fuel mileage has been an issue for William Byron in three races this season, costing him a victory at Michigan and a ...

NEWTON, Iowa - William Byron's clutch, fuel-saving performance at Iowa Speedway on Sunday, resulting in his second NASCAR Cup ...

William Byron's 21-race winless drought snapped at Iowa and other key takeaways as the NASCAR regular season winds down.

Chase Briscoe's summer surge hits career-best 11th top-10 at Iowa Speedway in NASCAR Cup Series, elevating his championship ...