Cnoc na Slea mountain info maps weather photos © Joseph Mischyshyn and licensed for reuse under this Licence Cnoc na Slea is the 16220th highest peak in the British Isles and the 1382nd tallest in Ireland Also known as Crocknasleigh Elevation 163.0 m (535 ft) Prominence 159.0 m (522 ft) Category Marilyn Hill / mountain range Donegal NW Nearest town OS map sheets OSi50: 002 (Donegal)