Three of the most famous Triple Crown winners are Secretariat, Seattle Slew and Affirmed. Secretariat won the title in 1973, followed by Seattle Slew in 1977 and Affirmed in 1978. Only 12 horses have gone on to win all three races that make up the Triple Crown.
The Triple Crown kicks off on the first Saturday of May with the running of the Kentucky Derby at Churchill Downs in Louisville, Ky. The winner of that race has the chance to capture the second leg, the Preakness Stakes, two weeks later at Pimlico Race Course in Baltimore, Md. The Belmont Stakes is the final race in the Crown, and it is run three weeks later at Belmont Park Race Track in Elmont, N.Y.
The Triple Crown had not been claimed for 25 years prior to Secretariat's win in 1973, but the horse made up for the drought by setting track records in all three races. He started dead last in each of the first two races, but he moved up on the field and was never challenged once he took the lead. He won the final race by 31 lengths to win the Triple Crown and claim his place as one of the finest thoroughbreds of all time.