2013 Tokyo Marathon 2:06:50 hours. The women's winner, Aberu Kebede, had a time of 2:25:34 hours, which was six seconds off the women's course best. The mass races set a new participation record with a total of 28,721 runners entering the race over 42.195 kilometres (26 miles and 385 yards), and 36,676 people taking part in the day's races as a whole. A day prior to the race, the International Friendship Run was held with a distance of roughly 4 km. The non-competitive race between athletes, organisers and registered marathon entrants began with warm-up radio exercises and took place in Shiokaze Park and
Marathon swimming Marathon swimming Marathon swimming is a class of open water swimming defined by long distances (at least 10 kilometers) and traditional rules based in English Channel swimming. Unlike marathon foot-races which have a specifically defined distance, "marathon swims" vary in distance. However, one commonly used minimum definition is 10 kilometers, the distance of the marathon swimming event at the Olympic Games. As in all open water swimming, tides, surface currents and wind-chop are major determinants of finish-times. For a given course, these factors can vary dramatically from day to day, making any attempt to draw conclusions about athletic ability by