Keadeen Mountain
Keadeen Mountain at, is the 152nd–highest peak in Ireland on the Arderin scale, and the 184th–highest peak on the Vandeleur-Lynam scale. Keadeen is situated at the far southwestern end of the Wicklow Mountains range, separated from the large massif of Lugnaquilla on its own small isolated massif with Carrig Mountain ; it overlooks the Glen of Imaal from the south.
Naming
According to Irish academic Paul Tempan, "Keadeen" is also the name of a townland in the nearby parish of Kilranelagh. In Irish the peak was sometimes called Céidín Uí Mháil in full, which was a name derived from the native group who gave their name to the nearby Glen of Imaal.Prehistory
The hilltop is crowned by a robbed-out cairn of unknown date. Just below the cairn a cursus monument of about 300 m length and 40 m width stretches down the western slope of the mountain. Its limiting banks and ditches are still visible in the landscape as roughly parallel 0.4 m high ridges and 0.3 m deep furrows respectively. According to its investigators the cursus is oriented towards the sun rise on summer solstice: standing at the centre of the cursus the sun rises behind the summit of Keadeen mountain. The cursus is tentatively dated to the Middle Neolithic.These monuments are embedded in a rich prehistoric landscape with prehistoric hillforts and dozens of cairns on top of Cloghnagaune, Spinans Hill and Baltinglass Hill to the west as well as several barrows there and in the valleys below. In fact the landscape between the valley of River Slaney and Keadeen Mountain can be compared to Brú na Bóinne.