The International Association of Athletics Federations established a standard track length of 400 metres, which means that a person who runs 300 metres around a track has completed three-quarters of the track. The 300-meter hurdles are the only track and field event that is 300 metres long. A person who runs 300 metres will cover around 984 ft.
Because few races are longer than 300 metres, some people utilise the 300-meter mark on a track as a pace indicator. A person running a 400-meter dash, for example, realises that they only have 100 metres remaining at the 300-meter mark and accelerates into the last phase of the race.