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.
Deon Kristofer Lendore was a Trinidad and Tobago sprinter who specialised in the 400 metres. He won a bronze medal in the 4 × 400 metres relay event at the 2012 Summer Olympics, and won medals at the Pan American Junior Athletics Championships, World Athletics Championships and World Athletics Indoor Championships. Lendore died in a car collision in Texas, United States, on 10 January 2022.
Anthony Raye Ketchum is an American former sprinter.
Kori Carter is an American track and field athlete specializing in hurdle races, the World Champion in the 400 metres hurdles event in 2017. Kori Carter was a nine-time All-American at Stanford University sponsored by Jordan Brand.
The Texas Longhorns women's track and field program is coached by Edrick Floréal. Other notable coaches have included Beverly Kearney, who has guided the Lady Longhorns to six NCAA Championships: Indoor Championships in 1998, 1999, and 2006, and Outdoor Championships in 1998, 1999, and 2005; and Terry Crawford, whose teams won Indoor Championships in 1986, 1988, and 1990, and Outdoor Championships in 1982 and 1986. Crawford's athletes also won the 1986 Women's Cross Country Championship. The program's first title was the 1982 AIAW outdoor track and field championship.
Kyle Clemons is an American track and field sprinter who competed collegiately for the Kansas Jayhawks and specializes in the 400-meter dash. He was the 2014 champion at the USA Indoor Track and Field Championships and won a bronze medal at the 2014 IAAF World Indoor Championships. His personal best for the event is 44.79.
Randy Jenelle Givens is an American former track and field athlete who competed in sprinting events. She set personal bests of 11.06 seconds for the 100-meter dash and 22.31 seconds for the 200-meter dash. Givens was a 200 m finalist at the 1984 Olympic Games and represented her country at the 1983 World Championships in Athletics. She was the 200 m gold medalist at the 1983 Pan American Games and returned to win a silver medal at the 1987 edition.
Kendall Baisden is an American track and field sprinter who specializes in the 400-meter dash. She holds a personal record of 50.46 seconds for the distance, set in 2014.
Michael Arthur Norman Jr. is an American sprinter. He previously held the world best time in the indoor 400 meters at 44.52 seconds. Outdoors, his 43.45, set at the 2019 Mt. SAC Relays is tied as the #4 on the all time list. In 2016, he became the world junior champion in both the 200 meters and 4×100 meter relay. In 2022, he became the world champion in both the 400 meters and 4x400 meter relay.
D'Andre "DeeDee" Hill is an American track and field coach and former athlete. She competed in sprint events, mainly in 100-meter dash. Her personal record in the event was 10.92 seconds. She represented her country over 100 m at the 1996 Atlanta Olympics and shared in a gold medal in the 4×100-meter relay at the 1995 World Championships in Athletics, having run in the heats only.
Raevyn Rogers is an American middle-distance athlete. She won a bronze medal in the 800 meters at the 2020 Tokyo Olympics, becoming the fourth fastest woman in U.S. history in the event. At the 2019 World Championships, Rogers came from seventh with 100m remaining in the race to place silver over USA teammate Ajeé Wilson in bronze. She earned a world indoor title as a member of national 4x400 m relay squad that took gold at the 2018 World Indoor Championships.
Keturah Orji is an American track and field athlete specializing in the triple jump. She has set a new US triple jump record twice.
Lindon Victor is a Grenadian athlete who competes in the decathlon. He is the 2023 World bronze medalist and a two-time Commonwealth Games champion (2018–2022).
Suziann Reid is an American-Jamaican former track and field sprinter who specialized in the 400-meter dash. She set a personal record of 50.74 seconds for the distance in 1999. She was a silver medalist with the American women's 4 × 400-meter relay team at the 1999 World Championships in Athletics. She was part of the World Championship team twice more, in 2001 and 2005, and helped the United States to silver at the 2002 IAAF World Cup and gold at the 2001 Goodwill Games.
Karissa Schweizer is an American middle- and long-distance runner, Olympian and World Record holder in the women's 4x1500 meters relay. She competed in the 2020 Tokyo Olympics in the 5000 meters and 10,000 meters events finishing 11th and 12th, respectively. In 2020, she set the indoor 3000 meters American Record with a time of 8:25.70.
Kahmari Montgomery is an American track and field sprinter specializing in the 400 m for Nike. He was the men's 400 m champion at the USA Championships in 2018, and at the NCAA Division I Championships in 2019. He represented the United States in the 4 × 400 m relay at the World U20 Championships in 2016 and at the inaugural Athletics World Cup in 2018, earning gold medals in both competitions.
Stanley Grant Holloway is an American professional hurdler and sprinter. He is a three-time world champion, 2020 Tokyo Olympic silver medalist in the 110 meters hurdles and the second-fastest man in history at the event with a personal best of 12.81 seconds, set at the U.S. Olympic Trials on June 26, 2021. In the 60 meters hurdles, Holloway is the 2022 Belgrade and 2024 Glasgow World Indoor champion and the world indoor record holder with a time of 7.27 seconds set at the 2024 USA Track & Field Indoor Championships.
Talitha LaNae Clark Diggs is an American track and field sprinter specializing in the 400 meters. Diggs won the 2022 U.S. national 400 m title.
Britton Wilson is an American track and field athlete specializing in the 400 meters hurdles and 400 meters. She finished fifth in the 400 m hurdles at the 2022 World Athletics Championships, her major championship debut. Wilson is the North American indoor record holder for the 400 m dash with a time of 49.48 seconds, set on March 11, 2023, in Albuquerque.
