A group of students raising funds for mountain rescue teams had to call for help after one of the group slipped and broke her leg.
The group were on a sponsored overnight challenge on Llangattock moor in the Brecon Beacons National Park in Powys.
Longtown and Brecon mountain rescue teams went to a "difficult recovery" after a call at 0600 BST on Wednesday.
The fund-raising group have asked not to be named but have paid tribute to their rescuers.
One of the group said: "We'd had a successful overnight camp, but one of the girls slipped and fell."
He added that the teams had reached them incredibly quickly.
"It took about three hours to get her off the mountain, and I would like to say how professional the teams were," he added.
The sponsored challenge raised £500 for the mountain rescue teams, and the rescue had "really brought home to us just how vital their services are".
A spokesman for the mountain rescue teams said a person with a "suspected double leg fracture" had been rescued and taken to Neville Hall hospital in Abergavenny.
All mountain rescue teams are voluntary bodies which rely on public donations.
"We understand the group was raising funds for mountain rescue teams and we would like to say how grateful we are," the spokesman added.
"We were just glad we could help when we were needed."