Knocknabrone Hill mountain info maps weather Knocknabrone Hill is the 9950th highest peak in the British Isles and the 968th tallest in Ireland Also known as Derryfanga Elevation 353.0 m (1158 ft) Prominence 190.0 m (623 ft) Category Marilyn Hill / mountain range MacGillycuddy's Reeks Nearest town OS map sheets OSi50: 078 (Kerry)