DAWN RUN

Dawn Run (1978–1986) was an Irish Thoroughbred racehorse (Deep Run - Twilight Slave) who was the most successful racemare in the history of National Hunt racing. She won the Champion Hurdle at the Cheltenham Festival in 1984 and the Cheltenham Gold Cup over fences at the festival in 1986. Dawn Run was the only racehorse ever to complete the Champion Hurdle - Gold Cup double. She was only the second mare to win the Champion Hurdle (and one of only three to win it in total), and one of only four who have won the Cheltenham Gold Cup. She was the only horse ever to complete the English, Irish and French Champion Hurdle treble.https://en.wikipedia.org/wiki/Dawn_Run