Knockmore mountain info maps weather Knockmore is the 10376th highest peak in the British Isles and the 992nd tallest in Ireland Also known as An Cnoc Mor Elevation 337.0 m (1106 ft) Prominence 259.0 m (850 ft) Category Marilyn Hill / mountain range Achill/Corraun Nearest town OS map sheets OSi50: 030 (Mayo)