Keadeen Mountain is a Hewitt of 653 m in Wicklow. Its closest neighbour in this register, Lugnaquillia Mountain, is 8.0 km away.
All four of its nearest neighbours are higher, up to Lugnaquillia Mountain at 924.7 m. It sits below Lugnaquillia Mountain, only 8.0 km to the east and 271.7 m higher. It is one of only four register hills in the Wicklow Hills S region, with Lugnaquillia Mountain, Croaghanmoira Mountain and Croghan Mountain. All four of its nearest neighbours lie to the east, so it stands at the western edge of its group. On the Hewitts height ladder it sits between High Spy (653.1 m) and Dooish (651.5 m). Its nearest higher summit, Slievemaan (759.7 m, 6.4 km east), is a listed top not profiled here. The summit is marked by a trig point.