NEWTON, Iowa — NASCAR is back in Iowa, and race fans will have three days of action at Iowa Speedway as some of the biggest names in American motorsports descend on Newton this weekend. The 2026 race weekend runs Friday, August 7 through Sunday, August 9, featuring the ARCA Menards Series, NASCAR O’Reilly Auto Parts Series, USAC Silver Crown Series and NASCAR Cup Series. Saturday: NASCAR and USAC Create a Unique DoubleheaderSaturday will be one of the busiest days of the weekend, with the NASCAR O’Reilly Auto Parts Series, NASCAR Cup Series and USAC Silver Crown Series all taking to the track. Sunday: Iowa Corn 350 Powered by EthanolSunday belongs to the NASCAR Cup Series and the Iowa Corn 350 Powered by Ethanol. That combination has helped Iowa Speedway develop a reputation for close racing, passing and cars running multiple lines around the track.