Emergency services were called out to Fairy Castle, south west of Three Rock mountain in the Dún Laoghaire–Rathdown area of County Wicklow at approximately 12.15pm this afternoon.
Dublin-Wicklow Mountain Rescue personnel were also on scene, where visibility was described as “very poor with low clouds, mist and fog”.
Elsewhere, a man has suffered serious head injuries in Cork after falling off a horse.
A second helicopter was dispatched to Kilbeg, near Skibbereen, where the man was described as being in critical condition.