Metrication in the United States traditional mile-based lengths. In the Olympics, athletes run 1500 meters, not 1600 meters. Running races in the U.S. are usually run in metric distances (e.g., the 100 metres dash or the 5K run), although the mile distance remains popular. But even 5 and 10 kilometer races most often have mile markers on the course, and no kilometer markers. Long-distance races are often measured in kilometers, although exceptions exist (generally 10 mile races). The marathon is referred to as a 26.219-mile race (the official marathon standard distance originally being in English units — 26 miles, 385 yards) rather than 42.195 km.
Athletics at the 1908 Summer Olympics – Men's marathon Athletics at the 1908 Summer Olympics – Men's marathon The men's marathon race of the 1908 Summer Olympics took place in London on 24 July 1908. Johnny Hayes won after Dorando Pietri was disqualified for having received assistance before the finish line. For the first time in an Olympic marathon, the distance was , which would become the standard distance in 1921. 75 competitors entered the race, of whom 55 from 16 nations started, with 27 from 11 nations finishing. At a meeting of the International Olympic Committee in The Hague in May 1907 it was agreed with the British