Lugduff () at , is the 154th–highest peak in Ireland on the Arderin scale, and the 186th–highest peak on the Vandeleur-Lynam scale. Lugduff is situated in the southern sector of the Wicklow Mountains range, and forms a broad horseshoe around the Upper Lake of the Glendalough valley with the mountains of Mullacor , Conavalla , the hydroelectric station at Turlough Hill , and Camaderry . Lugduff's steep western slopes, have a distinctive "corrugated" profile, and form the deep valley sidewall of the eastern flank of Glenmalure; Lugduff's western walls also sit at the T-junction of the Fraughan Rock Glen hanging valley with the Glenmalure valley. Just below Lugduff's summit, lies the popular 8-kilometre boarded mountain path of The Spinc White Trail around the Upper Lake of Glendalough. To the south of Lugduff is the subsidiary summit of Lugduff SE Top . File:Fraughan Rock Glen.jpg|Summit of Lugduff and its western slopes, from the Fraughan Rock Glen File:Glendalough lugduff.jpg|View from summit into [[Glendalough]], Upper (near) and Lower (far) lakes File:Lugnaquilla from Glenmalure.jpg|View from summit across [[Glenmalure]] into Fraughan Rock Glen, and [[Lugnaquilla]] File:Glendalough Upper Lake, Wicklow Ireland.