Ogwen | Yr Helgi Du Skyrace

🏔️ Ogwen 40 km – The Ultimate Mountain Challenge
The 40 km route is the headline act of the Ogwen | Yr Helgi Du weekend — a true test of endurance, strength, and mountain skill. Starting and finishing at Plas y Brenin, this demanding course takes runners across the towering peaks of the Glyderau and Carneddau ranges. With over 3,000 m of elevation gain, sections of Grade 1 scrambling, and exposed ridgelines, this is Skyrunning at its most authentic. From Castell y Gwynt to Pen yr Ole Wen and the mighty Carnedd Llewelyn, every climb is rewarded with jaw-dropping views — and the satisfaction of conquering one of the UK’s toughest mountain races.

⛰️ Ogwen 25 km – Classic Skyrunning Terrain
The 25 km route delivers a concentrated hit of mountain running magic. From Plas y Brenin, runners warm up on the Eryri Slate Trail before tackling the dramatic climb of Pen yr Ole Wen, gaining nearly 700 m in just two miles and featuring short sections of Grade 1 scrambling. The route continues along the iconic Carneddau skyline, linking Carnedd Dafydd, Carnedd Llewelyn, and Pen yr Helgi Ddu in a spectacular circuit of peaks, ridges, and descents. Technical, exhilarating, and endlessly scenic, the Ogwen 25 km is a pure mountain running experience for those who want a serious challenge in a compact distance.

🌄 Ogwen 15 km – The Accessible Adventure
New for 2025, the Ogwen 15 km offers a thrilling introduction to Skyrunning and the perfect entry point for those seeking a shorter, yet equally inspiring, mountain challenge. The route loops over Gallt yr Ogof and Cefn y Capel, combining runnable trails, rocky sections, and nearly 700 m of ascent. From start to finish, the views over the Ogwen Valley, Tryfan, and the Carneddau range are simply breathtaking. Tough but achievable, the 15 km captures the essence of Eryri’s wild beauty — the perfect stepping-stone into the world of mountain racing.

Spectacular scenery - views across Anglesey and Eryri
Professional timing - chip timing, online results & sms text result
Fully signed and marshalled route
Mountain Leader support
Access to event village - music, commentary, food vendors and kit
Locally sourced slate finisher coaster
Finish line food
Event memento worth £12.50
Drink stations (Water, High5 & High5 gels)
Secure bag drop