iThe Coomloughra Horseshoe in Kerry's MacGillycuddy's Reeks is Ireland's great ridge day, and the Beenkeragh Ridge is its crux. The loop takes in all three of Ireland's summits over 1,000 m, Beenkeragh, Carrauntoohil and Caher, with about 1,300 m of ascent in roughly 12 km. The steep, rocky climb to…