The Marlboro Cup Invitational Handicap was a Thoroughbred horse race first run in September 1973 at Belmont Park in Elmont, New York. A Grade 1 race for horses 3 years old and up, it was raced over a distance of 1 1/8 miles on a dirt track.The race came into existence as a result of the huge popularity of Secretariat, who in 1973 beaome the first U.S. Triple Crown champion in twenty-five years.
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