The Glendalough Distillery was set up by a group of friends from Wicklow and Dublin. Their inspiration stems from the story of St. Kevin, a 6th century monk who founded a monastery in Glendalough and their passion for reviving the heritage of craft distilling in Ireland. Together they built a craft distillery near Glendalough in the Wicklow mountains, where they initially distilled Poitín and subsequently, Gin. They work closely with Irish whiskey distilleries to source and develop their whiskey for their whiskey range. In 2019, Mark Anthony Brands International took complete ownership of the brand.
The Glendalough Single Grain Madeira Cask Finish is matured in charred ex-bourbon casks and finished in a single Canteiro aged Madeira cask . This expression has no added colouring and bottled at 42% abv.