Cuilcagh is a Hewitt of 666 m in Fermanagh and Omagh, Cavan. Nothing higher stands within 63.9 km; the nearest higher summit is Croaghgorm (673 m), to the north.
It is also on the county tops list, as the highest point of its historic county. The key col lies 35.1 km away to the south, at 61 m. Its closest neighbour in this register, Truskmore, is 41.1 km away. Its drop of 605 m is 91% of its height: the col linking it to higher ground is only 61 m above sea level. In the database's Leitrim and W Cavan region it is the highest of two register hills, above Truskmore. All four of its nearest neighbours lie to the north, so it stands at the southern edge of its group. Its other name is Cuillagh. The summit is marked by a trig point.
