Until now, K2 was the only mountain higher than 8,000m not to be conquered in winter.
I am am avid climber with a goal for everest, this is historic! First ever summit of the only 8000'er
Never summitted in winters!!
Unfortunately the spanish guy died so only Nepali sherpas have the honors.
A team of 10 Nepali climbers has set a new world record by becoming the first to reach the summit of K2, the world's second highest mountain, in winter.
Mountaineer Nimsdai Purja, a member of the group, said they reached the peak at 17:00 local time (12:00 GMT).
Dozens of climbers have been on the 8,611m (28,251ft) mountain this winter hoping to achieve the same feat.
But one Spanish mountaineer has died after suffering a fall this weekend while descending.
K2, which is only 200m shorter than Everest, is part of the Karakoram Range that straddles the Pakistan-China border.
One of only 14 mountains higher than 8,000m, it is widely considered the most demanding of all in winter.
It has long been referred to as "the savage mountain", a name that stuck after US mountaineer George Bell said of his own attempt in 1953: "It is a savage mountain that tries to kill you."
Among the most treacherous sections is the notorious "bottleneck", a couloir liable to icefalls. Eleven climbers were killed there in an avalanche in 2008.