The Alcibiades Stakes is an American Thoroughbred horse race run annually in early October at Keeneland Race Course in Lexington, Kentucky. A Grade I race, it is open to two-year-old fillies willing to race one and one-sixteenth miles on the dirt. Sponsored by Darley Racing since 2003, the Alcibiades Stakes was named for Hal Price Headley's great foundation mare Alcibiades.The race is currently part of the Breeders' Cup Challenge series.