Seven Sisters Skyline 55k

🏔 The Seven Sisters Skyline Ireland 2025 🏔
📅 Saturday September 20th 2025
📍 Derryveagh Mountains, Donegal

📜 Event overview:
Prepare for an epic mountain running experience in Donegal’s stunning Derryveagh Mountains, also known as the “Seven Sisters.” This iconic event features breathtaking routes, steep ascents, and rugged terrain, making it Ireland’s toughest mountain running challenge.

Donegal, Ireland’s most northerly county, offers unspoiled landscapes, wild coastlines, and was named ‘Coolest Place on the Planet’ by National Geographic in 2017. This is mountain running at its finest in a location straight out of a Tolkien tale!

🏅 Events and distances:

🏔 55km Skyline: 4,000m+ ascent | €150
⛰ 30km Sky Challenge: 2,100m+ ascent | €140
🌄 16km Altan Castle: 800m+ ascent | €85

📍 Route highlights:
The course winds through the Seven Sisters Mountains, featuring:

Mount Errigal (751m)
Mackoght, aka Little Errigal (555m)
Aghla More (584m)
Ardloughnabrackbaddy (603m)
Aghla Beg (564m)
Crocknalaragagh (471m)
Muckish (666m)
Starting in the charming Gaeltacht village of Dunlewey, nestled at the foot of Mount Errigal, participants will journey through a landscape as rugged as it is beautiful.

🎟 Registration fees:

€150 – 55km Skyline
€140 – 30km Sky Challenge
€85 – 16km Altan Castle

🎽 Challenge yourself in one of Ireland’s most legendary mountain running events. Stunning views, unrelenting climbs, and a sense of true adventure await! 🏃‍♂