Knockbrack mountain info maps weather Knockbrack is the 3633rd highest peak in the British Isles and the 255th tallest in Ireland Also known as Cnoc Breac Elevation 611.0 m (2005 ft) Prominence 45.0 m (148 ft) Features No feature: grass & heather Category Simm Hewitt Dillon Arderin Vandeleur-Lynam Hill / mountain range Mangerton Nearest town OS map sheets OSi50: 078 (Kerry)