Brecon Mountain Rescue Team were called out to Llyn Y Fan Fach on Thursday, October 26.
The team responded to a report of an exhausted, hypothermic casualty.
A spokesperson for the rescue team said: "The helicopter performed some incredibly skilled flying and with persistence managed to get to the casualty and transport them to hospital to get checked over. A big thankyou to rescue 187 for helping!
"Please ensure you stay #AdventureSmart whilst out in the hills!"