There are two seasons for track and field. There is an indoor season, run during the winter and an outdoor season, run during the spring.
Most indoor tracks are 200 meters and consist of four to six lanes. There are also some 150 meter indoor tracks, and others as small as 120 meters have been used.
Some "oversize tracks" (larger than 200 meters) are popular for American collegiate athletics despite the fact that they are not considered valid for setting indoor records. Often an indoor track will have banked turns to compensate for the tight radius of the turns.
The banking can help prevent injuries to the athlete, while also promoting higher speeds. In an indoor track meet athletes contest the same track events as at an outdoor meet, with the exception of the 100 m and 110 m/100 m hurdles (replaced by the 55 or 60 m sprint and 55 or 60 m hurdles at most levels, or the 45 m sprint and hurdles at the high school level), the 10,000 m run, 3,000 m steeplechase, 400 m hurdles.
Indoor meets also have the addition of a 3,000 m run normally at both the collegiate and elite level, instead of the 10,000 m. The 5,000 m is the longest event commonly run indoors, although there are situations where longer distances have been raced.
In the mid 20th century, there was a series of "duel" races on Madison Square Garden's indoor track, some of which featured two men racing a marathon (26.2 miles).
However, this is an extremely rare occurrence, for obvious reasons. In some occasions, there may also be a 500 m race instead of the open 400 m normally found outdoors, and in many college championship races indoors both are contested.
In field events, indoor meets only feature the high jump, pole vault, long jump, triple jump, and shot put (weight throw). Due to space limitations, these events take place on the infield, within the circumferential track.
The longer throws of javelin, hammer and discus are added only for outdoor meets, as there is normally not enough space in an indoor stadium to house these events.
LIST OF OTHER DISCIPLINES