Jon commented on his blog:

"I think this is the first free ascent and first one day ascent in winter but credit for that goes to the Steck..."

The pair made the most of a good weather forecast, but also had to deal with extremely cold weather. Night time temperatures in the valley were as low as -22.

• You can read Jon's excellent report with great photographs on his website: Alpine Exposures

Ueli Steck is sponsored by various companies including Mountain Hardwear , Scarpa , Petzl , Beal

Jon Griffith is a professional mountain photographer - see his work on Alpine Exposures