This information is taken from New Climbs 1991.
The crag is to be found below the lookout tower on the headland that guards the north-western extremity of Portacloy Bay, near Benwee Head, North Mayo. Park at the Portacloy Pier, ford a stream and head towards the tower. Just beyond this is an abseil stake - which you ignore and walk down the west side of the headland to the top of a small prow of rock. Scramble steeply down from this to ledges, some distance above the sea. Traverse L along these to the tip of the head. The crag is around to to the L. It has only one route so far.
Thirtysomething HS 15m
Belay at the end of the ledges below the R edge of the cliff and climb up an exposed groove just L of the arete to the top.
K. McDonald & T. Ryan Nov 1991.
Two easier lines were soloed to the R of the arete.