Four men who were on a fundraising challenge had to call Braemar Mountain Rescue team in the early hours of Sunday
Four walkers taking part in a charity walk had to be rescued from the Cairngorms.
The four men became exhausted during the hike and Braemar Mountain Rescue was called out at about 3am on Sunday (30 August).
The group were taking part in a 24-hour walk for charity, and had already scaled Ben Macdui, before getting into difficulty on Cairn Toul.
The rescue helicopter from Inverness could not reach the walkers on the hill due to low cloud, but picked them up further down the mountain. The men were airlifted to safety in temperatures of around -10C.
It is believed one of the men was hypothermic, but recovered enough to walk to safety.
Braemar Mountain Rescue team said that it was the fourth call-out in as many days the team had been involved in.
They said people were often ill-equipped or without the correct skills for the mountain environment and walkers should ensure they are prepared as temperatures become cooler.