Seven Sisters Skyline

Take on one of Ireland’s toughest and most spectacular mountain-running challenges in the heart of Donegal’s Derryveagh Mountains. The Seven Sisters Skyline brings trail and mountain runners to Dunlewey for an unforgettable day among some of Donegal’s most iconic peaks. The flagship 55km ultra follows the Seven Sisters from Errigal towards Muckish and includes an enormous 4,000 metres of climbing. There are also shorter challenges available, including the 30km Seven Sisters Sky Challenge and the 16km Altan Castle route, making this one of the biggest mountain-running events in Ireland.