How many miles is the running event held every Saturday morning in fifteen countries across five continents?
5K run The 5K run is a long-distance road running competition over a distance of five kilometres (3.1 miles). Also referred to as the 5K road race, 5 km, or simply 5K, it is the shortest of the most common road running distances. It is usually distinguished from the 5000 metres track running event by stating the distance in kilometres, rather than metres.
Half marathon world record progression The world record in the half marathon has been officially recognised since 1 January 2004 by the International Association of Athletics Federations (IAAF), the international governing body for the sport of athletics. A total of five men's world records and six women's world records have been officially ratified since that date. The IAAF officially recognised the fastest times prior to that date as a "world best" from 1 January 2003 onwards. Before that date, the IAAF did not recognise any road running world records, though the concept of a world record was recognised by other organisations, such as the Association of Road Racing Statisticians (ARRS).