#4 The oldest marathon
The oldest marathon to take place annually is the Boston Marathon which was started by the Boston Athletic Association way back in 1897. In the first edition of this long-distance race, only 15 participants accepted the challenge and lined up at the starting mark.
However, since then the Marathon has come a long way with its popularity growing each year by leaps and bounds. It rose to such an extent that in 1971 the organisers made it mandatory that all the runners were required to complete the 26.2-mile stretch in less than 3 and a half hours in order to stand a chance of qualification.
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