Marathon world record progression races were first held in 1896, but the distance was not standardized by the International Association of Athletics Federations (IAAF) until 1921. The actual distance for pre-1921 races frequently varied slightly from the present figure of 42.195 km (26 miles 385 yards). In qualifying races for the 1896 Summer Olympics, Greek runners Charilaos Vasilakos (3:18:00) and Ioannis Lavrentis (3:11:27) won the first two modern marathons. On April 10, 1896, Spiridon Louis of Greece won the first Olympic marathon in Athens, Greece in a time of 2:58:50; however, the distance for the event was reported to be only 40,000 meters. Three
Mexico City Marathon Mexico City Marathon The Mexico City Marathon () is an annual road running event over the marathon distance which is held on the streets of Mexico City in late August or early September that in 2016 received IAAF Bronze Label Status. The race was established in 1983 at a time of growing interest in marathons in the country – the Independencia Marathon had been launched three years earlier and the Monterrey Marathon had been run over the full distance in 1982. The winner of the first women's race, María del Carmen Cárdenas, later became one of the first female Olympic