Marathon from the start at Windsor Castle to the royal entrance to the White City Stadium, followed by a lap (586 yards 2 feet; 536 m) of the track, finishing in front of the Royal Box. The course was later altered to use a different entrance to the stadium, followed by a partial lap of 385 yards to the same finish. The modern standard distance for the marathon was set by the International Amateur Athletic Federation (IAAF) in May 1921 directly from the length used at the 1908 Summer Olympics in London. An official IAAF marathon course is 42.195 km (42
Athletics at the 1920 Summer Olympics – Men's marathon Athletics at the 1920 Summer Olympics – Men's marathon The men's marathon event was part of the track and field athletics programme at the 1920 Summer Olympics. The distance of this race was 42.75 kilometres. The competition was held on Sunday, 22 August 1920. 48 runners from 17 nations competed. The weather during the race has been described as "cool". An Associated Press report described the weather as "cold and showery", but "fine running weather for the marathoners". These were the standing world and Olympic records (in hours) prior to the 1920 Summer Olympics. "(*)" Distance was 40.2 kilometres Hannes