Running tracks are typically oval-shaped, with two straightaways and two curved ends. They are used for running events such as sprints, middle-distance races, and long-distance races. The track is usually made of a synthetic material such as rubber or polyurethane, and is designed to provide a consistent surface for athletes to run on. The size of the track varies depending on the type of event being held, but the standard size for an Olympic-level track is 400 meters in length.