The Casey's General Store 150 is a NASCAR K&N Pro Series East and NASCAR K&N Pro Series West combined race held annually at Iowa Speedway. From 2007 to 2010, it was a 175-mile (282 km) race. In 2010, it was a 153.1-mile (246.4 km) race. Since 2012, it is reduced to 131.2 miles (211.1 km). Starting in 2011 the race became a support race for the NASCAR Xfinity Series weekend.