Head Of The Charles Regatta®, the world's largest two-day rowing event, was first held on October 16, 1965. The race was established by the Cambridge Boat Club members D'Arcy MacMahon, Howard McIntyre, and Jack Vincent, with the advice of Harvard University sculling instructor Ernest Arlett. Arlett proposed that a "head of the river" race similar in tradition to races held in his native England, be held on the Charles River. Over the past 46 years, the Head Of The Charles regatta has grown tremendously. Today, more than 8,000 athletes from around the world compete in 55 different race events. The Regatta grew to a two-day event in 1997 and now attracts up to 300,000 spectators during the October weekend.