The Glen of Imaal (Gleann Uí Mháil) is a remote valley in the western Wicklow Mountains. Ringed by Lugnaquilla (highest point in Leinster) and its foothills. Much of the Glen is used by thearmy as an artillery firing range, and the many walkers who use the Glen are well advised to observe the times of firing practice and to refrain from picking up strange objects.
Derrynamuck in the Glen Of Imaal is a cottage dedicated to the memory of Michael Dwyer, a celebrated 1798 leader. It is now well known as the Dwyer-McAllister cottage for it was here that a group of Irish rebels led by Michael Dwyer were hiding when they were surrounded by British troops. Samuel McAllister died when he drew enemy fire to allow Dwyer to escape, and thereby prevent further bloodshed as the British troops were killing innocent farmers in nearby cottages to reach Dwyer.
Military firing range
Much of the Glen of Imaal (5,948 acres) has been used as an army artillery range since 1900, and caution is advised when attempting to use areas within the army range. However, notices are regularly posted at key entry points as to when the army are on field exercise.
The highest mountain in Wicklow and one of the highest mountains in Ireland, Lugnaquilla, can be accessed in the Glen with Fentons pub a common starting point. It is advisable to remember that Lugnaquilla requires some hill-walking experience to climb, and should not be attempted alone, nor when there is a possibility of dense fog. The Glen of Imaal Red Cross Mountain Rescue Team was formed in the area in 1983. It continues to serve this area and Co. Wicklow in its entirety in partnership with Dublin-Wicklow Mountain Rescue Team.