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. "Head" races, a class of regattas, are generally three miles long-boats race against each other and the clock, starting sequentially approximately fifteen seconds apart. Winners of each race receive the honorary title of "Head of the River" or, in this case, "Head Of The Charles."