Cork Ireland: Four Peaks 2016 Challenge Climb the highest Peak in each of the four provinces in 2016. The first peak is Carrauntoohil at 1,038 metres (3,406 feet) Ireland’s highest mountain. The second peak challenge is Mweelrea (814 metres), Connaught’s highest mountain. The third peak challenge is Lugnaquilla 925 metres (3,305 feet) which is situated in the Wicklow Mountains. Slieve Donard (