Dooish Mountain mountain info maps weather Dooish Mountain is the 12548th highest peak in the British Isles and the 1169th tallest in Ireland Also known as An Dubhais Elevation 266.0 m (873 ft) Prominence 172.0 m (564 ft) Category Marilyn Hill / mountain range Inishowen Nearest town OS map sheets OSi50: 006 (Donegal, Tyrone) OSi50: 007 (Londonderry)