Page "Athletics (sport)" Paragraph 47

A standard outdoor track is in the shape of a stadium, 400 metres in length, and has at least eight lanes 1. 22 m in width.

Older track facilities may have nonstandard track lengths, such as 440 yards ( 402. 3 m ) ( common in the United States ).

Historically, tracks were covered by a dirt running surface.

Modern All-weather running tracks are covered by a synthetic weather-resistant running surface, which typically consists of rubber ( either black SBR or colored EPDM granules ), bound by polyurethane or latex resins.

Older tracks may be cinder-covered.