4th year to climb Cavan highest peak. Beautiful views at 665 meters. Keep the date 17th May 2014 for the 4th year of Cuilcagh Challenge for Cystic Fibrosis Cavan Branch.. A great day out suitable for all ages from 10 years +. Cuilcagh is Cavan highest peck standing at 665 meters high. It's not the hardest of climbs. It's all about taken your time & enjoying the fabulous views. It's €20 per person & family rates available. Please support & share this with all your friends. Thank you.