Slieve Bearnagh (from the Irish: Sliabh Bearna) is a mountain in the Mourne Mountains, Northern Ireland. Its summit is crowned by a number of rocky tors. The Mourne Wall crosses the summit of Slieve Bearnagh east to west. Paths lead to the cols on either side of the mountain, namely Pollaphuca ("pool of the púca") to the west and Hare's Gap to the east. From the latter, one can also descend southwards to the head of the Ben Crom reservoir.