4 × 100 metres relay 4 × 100 metres relay The 4 × 100 metres relay or sprint relay is an athletics track event run in lanes over one lap of the track with four runners completing 100 metres each. The first runners must begin in the same stagger as for the individual 400 m race. A relay baton is carried by each runner. Prior to 2018, the baton had to be passed within a 20 m changeover box, preceded by a 10 metre acceleration zone. With a rule change effective November 1, 2017 that zone was modified to include the acceleration zone as part
All-weather running track Bill Nieder was instrumental in developing the product and selling it for this first use in the Olympics. An all-weather surface has become standard ever since. Another Tartan track was installed on a temporary basis for the 1968 United States Olympic Trials held at altitude at Echo Summit, California, before being moved to South Tahoe Middle School, where it survived for almost 40 years. An original Tartan track is still in place at "Speed City" San Jose State University on a satellite to the campus at 10th Street and Alma. Years of the abuse of tractors tearing it and cars