Glenmalure () is a 20-kilometre long U-shaped glacial valley in the Wicklow Mountains in Ireland. Glenmalure is an important base for climbing in the Wicklow mountains, and particularly accessing the massif of Lugnaquilla, and contains one of the earliest An Oige youth hostels in Ireland. Glenmalure was also an important historical area and the site of the Battle of Glenmalure in 1580, as well as various events in the Irish Rebellion of 1798.