The Glendalough 25 Year Old is the oldest and most prestigious expression ever released by the distillery, showcasing a quarter-century of masterful maturation. Aged in three types of casks—starting with ex-bourbon, then Oloroso sherry, and finished in virgin Irish oak harvested from the forests surrounding the distillery—this whiskey reflects Ireland’s natural terroir and the distillery’s craft-first ethos. Layers of flavour unfold with each sip: toffee, fig, and dark chocolate give way to rich sherry influence, warming spice, and earthy oak. The final maturation in Irish oak adds a distinctive native complexity not found in any other whiskey. With only 1,800 bottles produced globally, it’s an ultra-rare release meant for true connoisseurs. The finish is incredibly long and refined, leaving impressions of leather, dried fruit, and toasted wood. A masterpiece of Irish whiskey, the 25 Year Old is a pinnacle achievement for both the brand and collectors.