Oaks, one of the English Classic horse races (along with the Derby, Saint Leger, Two Thousand Guineas, and One Thousand Guineas), an event for three-year-old fillies, established in 1779, and run over a 1.5-mile (about 2,400-metre) course at Epsom Downs, Surrey, also the site of the Derby. The Oaks was named for the nearby residence of the 12th Earl of Derby, whose horse Bridget won the first running.