12-hour run explained

A 12-hour run is a form of ultramarathon in which each competitor tries to run as far as possible in 12 hours. The event is typically held on 1to loops, but sometimes is held on 400m (1,300feet) tracks.^[1] Some races are held on trails and others are held on sidewalks in city parks. Top runners will often run or more (the best doing about), depending on conditions. Some participants will have a crew to help them, while others set up a camp with their equipment and supplies near the starting area, with good access from each loop.

Records

World records of 12 hour^[2]

	Women			Men
	Athlete	Distance (m)	Place	Athlete	Distance (m)	Place
Road	Satu Lipiäinen	153,600	Kokkola, 20 May 2023^[3]	Alexander Sorokin	177,410	Tel Aviv, 7 January 2022^[4]
Track	Camille Herron	149,130	Phoenix 9/10 December 2017	Zach Bitter	163,785	Phoenix 14 December 2013

See also

• One hour run
• 24-hour run

Notes and References

1. If the loop is less than 1 km, run direction changes every 2-4 (sometimes 6) hours.
2. Web site: 201608 WBP WABP overall.pdf . 2016-11-16 . 2017-06-23 . https://web.archive.org/web/20170623101322/http://www.iau-ultramarathon.org/statistics/201608_WBP_WABP_overall.pdf . dead .
3. Web site: Satu Lipiäinen rikkoi 12 tunnin juoksun ME:n!. yleisurheilu.fi. fi. 21 May 2023. 28 May 2023.
4. Web site: IAU RECORDS COMMITTEE 2021 -2025. The International Association of Ultrarunners (IAU). 12 May 2022. 21 July 2022.