Knocklettercuss mountain info maps weather Knocklettercuss is the 9471st highest peak in the British Isles and the 930th tallest in Ireland Also known as Leitir Cois Elevation 370.0 m (1214 ft) Prominence 212.0 m (695 ft) Category Marilyn Hill / mountain range North Mayo Nearest town OS map sheets OSi50: 023 (Mayo)