24-hour run

{{Short description|Form of ultramarathon}}

{{For|similar 24-hour racing events|24-hour race (disambiguation){{!}}24-hour race}}

File:24-Hour Run for Charity at Kandahar Airfield DVIDS395118.jpg

A 24-hour run is a form of ultramarathon, in which a competitor runs as far as they can in 24 hours. They are typically held on 1- to 2-mile loops or occasionally 400-meter tracks.

Top runners will often run {{Convert|200|km|sigfig=3}} or more, depending on conditions, and the best can go beyond {{Convert|270|km|sigfig=3}}. Some participants will have a crew to help them, but others just set up a camp with all the gear and supplies they need near the starting area to access each loop. Often 24-hour events are combined with 6-, 12-, and 48-hour events. 24-hour runs have also been held in relay formats, with runners completing a mile each in succession for 24 hours. Often these events are not internationally sanctioned, and are more for charitable purposes.Bangor Daily News, Bangor, Maine, USA, Style Section, Page 17, "Marathon to raise money for American Cancer Society"

The world records for the event on all surfaces are 270.363 km (167.996 miles) for women, set by Miho Nakata of Japan in 2023,[https://www.irunfar.com/japans-miho-nakata-sets-womens-24-hour-world-record iRunFar: Japan’s Miho Nakata Sets Women’s 24-Hour World Record.]{{Cite web |date=2023-12-02 |title=Japan's Miho Nakata Breaks 24-Hour World Record By Narrow 246 Meters At World Championships |url=https://marathonhandbook.com/24-hour-record/ |access-date=2024-01-03 |language=en-US}} and 319.614 km (198.598 miles) for men, set by Aleksandr Sorokin of Lithuania in 2022.{{Cite news|title=2022 IAU 24 European Championships Results|url=https://iau-ultramarathon.org/Men%20individual%20results%202022%20IAU%2024H%20EC.pdf|access-date=18 September 2022}}