MacGillycuddy's Reeks

MacGillycuddy's Reeks (Irish: Na Cruacha Dubha, meaning 'the black stacks') is a sandstone and siltstone mountain range in the Iveragh Peninsula in County Kerry, Ireland. Stretching 19 kilometres (12 miles), from the Gap of Dunloe in the east, to Glencar in the west, the Reeks is Ireland's highest mountain range, and includes most of the highest peaks and sharpest ridges in Ireland, and the only peaks on the island over 1,000 metres (3,300 feet) in height.

Near the centre of the range is Carrauntoohil, Ireland's highest mountain at 1,038.6 metres (3,407 ft). The range was heavily glaciated which carved out deep corries (e.g. the Eagle's Nest), U-shaped valleys (e.g. Lough Coomloughra), and sharp arêtes and ridges (e.g. the Beenkeragh Ridge).

The range, part of the Reeks District, is a destination for mountain walkers and climbers and includes some of Ireland's most regarded walking routes such as the 15–kilometre Coomloughra Horseshoe, and the 26-kilometre MacGillycuddy's Reeks Ridge Walk that traverses the full range; it is estimated that over 140,000 people visit the range each year. The entire range is in private ownership; however, reasonable access is given for recreational use.