Glenbeg East mountain info maps weather Glenbeg East is the 9414th highest peak in the British Isles and the 926th tallest in Ireland Also known as Knocknamuck Elevation 372.0 m (1220 ft) Prominence 264.0 m (866 ft) Category Marilyn Hill / mountain range Partry/Joyce Country Nearest town OS map sheets OSi50: 038 (Mayo, Galway)