The Iowa Oaks is a Listed American Thoroughbred horse race for three years old fillies, over a distance of 1+1⁄16 miles on the dirt held annually in early July at Prairie Meadows in Altoona, Iowa.
The race was inaugurated in 1989[1] at a distance of 1 mile in was run in late April.
[2] When the track administration resumed the event it was known as the Heartland Oaks and it was extended to the current distance of 1+1⁄16 miles and scheduled in July.
[1] In 1995 the racetrack added slot machines and the venue was able to increase stakes thus attracting better quality horses.
[3] In 2024 the event was downgraded by the Thoroughbred Owners and Breeders Association to Listed status.