A 100-kilometer (62-mile) race in northwestern China turned deadly after hail, freezing rain and gale-force winds hit the high-altitude race.

CBS reports after an all-night rescue operation in freezing temperatures involving more than 700 personnel, rescuers were able to confirm that 151 people were safe, out of a total of 172 participants. 21 runners had died.

The runners were racing on an extremely narrow mountain path at an altitude reaching 2,000-3,000 meters (6,500-9,800 feet). A race organizer said there were no predictions of extreme weather for the day of the race, however a local branch of the National Early Warning Information Center had warned for the past three days of hail and strong winds.

The race followed a relatively established course that had been used in 4 previous events. The runners were not dressed for winter-like conditions, many wearing short-sleeved tops.

Our deepest condolences go out the family and friends of the victims.

Unofficial Networks Newsletter

Get the latest snow and mountain lifestyle news and entertainment delivered to your inbox.

Hidden
Newsletters
This field is for validation purposes and should be left unchanged.