Tievereivagh mountain info maps weather Tievereivagh is the 11860th highest peak in the British Isles and the 1108th tallest in Ireland Also known as Derreen Elevation 286.0 m (938 ft) Prominence 250.0 m (820 ft) Category Marilyn Hill / mountain range Achill/Corraun Nearest town OS map sheets OSi50: 030 (Mayo)