Gansu ultramarathon disaster

Gansu ultramarathon disaster
Native name 黄河石林百公里越野赛事故
(Yellow River Stone Forest 100k trail running race accident)
Date22 May 2021 (2021-05-22)
Time10:30–13:00 (China Standard Time[note 1])
LocationMijiashan Hill, Yellow River Stone Forest, Jingtai County, China
Coordinates36°59′42″N 104°17′19″E / 36.99500°N 104.28861°E / 36.99500; 104.28861
CauseHypothermia; slow rescue
Participants172
Deaths21
Non-fatal injuries8

On 22 May 2021, 21 professional runners died from hypothermia out of the 172 competing in a government-run 100-kilometre (62 mi) trail running race[note 2] held in the Yellow River Stone Forest in Jingtai County, Gansu, China.

When a cold front struck, rain and possibly graupel were carried by gusts reaching level 9 (75–88 km/h [47–55 mph]). The apparent temperature ("body feel") dropped from 1 °C (34 °F) at 10:00 to −5 °C (23 °F) from 11:20 to 13:50. Many runners collapsed unconscious from hypothermia while reaching the 2,230-metre (7,320 ft) checkpoint. The organizers were unaware of the scope of the disaster because they did not assign any staff between checkpoints and they did not know the distressed point was in mobile phone signal blind spots. The collapsed runners did not survive and rescuers did not arrive until 19:00.[1] The dead were from the lead pack due to the timing of the cold front, while the slower runners survived. The number of fatalities and the fatality rate surpassed the U.S.–China joint Yangtze rafting disaster [zh] in 1986 in Sichuan.[2]


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  1. ^ Cite error: The named reference jiemian 20210526 was invoked but never defined (see the help page).
  2. ^ Kitamura, Yutaka [北村 豊] (2 July 2021). "死者は21人…中国「100キロクロカン」で何が起きていたのか? 一大産業化するマラソンバブルの暴走". Gendai Business. Tokyo: Kōdansha. Archived from the original on 7 July 2021.