The St. Louis Derby run at Fairmount Park Racetrack in Collinsville, Illinois held its inaugural race on August 26, 2006. Open to three-year-old thoroughbred horses of either gender, and run at one and one sixteenth miles on the dirt, this ungraded stakes race offers a purse of $250,000, funded privately by local business men.
Inaugurated in 1926, the race was called the Fairmount Derby. It ran until 1930 after which it did not return until 1967 and for a time achieved Grade III status. It was last run in 2006. Following this hiatus, it was reintroduced in 2021 as the FanDuel Saint Louis Derby with a $250,000 prize pool and has been run yearly in the month of August since.