The 400 metres, or 400-meter dash, is a sprint event in track and field competitions. It has been featured in the athletics programme at the Summer Olympics since 1896 for men and since 1964 for women. On a standard outdoor running track, it is one lap around the track. Runners start in staggered positions and race in separate lanes for the entire course. In many countries, athletes previously competed in the 440-yard dash (402.336 m)—which is a quarter of a mile and was referred to as the "quarter-mile"—instead of the 400 m (437.445 yards), though this distance is now obsolete.
The distance medley relay (DMR) is an athletic event in which four athletes compete as part of a relay. With its inclusion in the IAAF World Relays program, the IAAF announced on May 1, 2015 that the event would be an official world record event.
The NCAA Division I Men's Outdoor Track and Field Championship is an annual collegiate outdoor track and field competition for men organised by the National Collegiate Athletic Association (NCAA). It has been held every year since 1921, except for 1924 and 2020. The first edition of the championship was held in 1921 and the competition expanded to two divisions in 1963 and three divisions in 1974.
The NCAA Division I Women's Outdoor Track and Field Championships are the annual collegiate track and field competitions for women athletes representing Division I institutions organised by the National Collegiate Athletic Association (NCAA). It has been held every year since 1982, except for 2020.
The NCAA Women's Division I Indoor Track and Field Championship is an annual collegiate indoor track and field competition for women from Division I institutions organized by the National Collegiate Athletic Association. It has been held every year since 1983, except for 2020.
The NCAA Division III women's indoor track and field championships are contested at the annual track meet hosted by the National Collegiate Athletic Association to determine the individual and team national champions of women's collegiate indoor track and field among its Division III members in the United States. It has been held annually since 1983.
The NCAA Division III men's indoor track and field championships are contested at the annual track meet hosted by the National Collegiate Athletic Association to determine the individual and team national champions of men's collegiate indoor track and field among its Division III members in the United States.
The 2014 NCAA Division I Indoor Track and Field Championships was the 50th NCAA Men's Division I Indoor Track and Field Championships and the 33rd NCAA Women's Division I Indoor Track and Field Championships, held at the Albuquerque Convention Center in Albuquerque, New Mexico near the campus of the host school, the University of New Mexico. In total, thirty-two different men's and women's indoor track and field events were contested from March 14 to March 15, 2014.
Ronnie Ash is an American track and field athlete specializing in hurdles. With his 12.99 (+1.2) 110 metres hurdles on June 29, 2014 in a semi-final round of the USA Outdoor Track and Field Championships in Sacramento, California, he moved into the prestigious sub 13 club and is currently the 17th fastest hurdler in history.
2025 NCAA Division I Indoor Track and Field Championships 
United States 
