A beautiful & historic 15k in the Ogwen Valley
Trail Running | Ogwen | Yr Helgi Du 2026
Ogwen | Yr Helgi Du 2026 Trail Running 15K
Step into the mountains with the Ogwen 15km, the perfect introduction to Mountain Running in Eryri. This stunning loop from Plas y Brenin takes you high over Gallt yr Ogof and along the sweeping ridge of Cefn y Capel, before descending back into the heart of the Ogwen Valley.
With nearly 700m of elevation packed into 15km of rugged trails, including the 805m summit of Foel Goch, this race delivers a true mountain running experience without the full ultra-distance commitment. Expect technical terrain, exhilarating ridge running, and panoramic views across the Carneddau and beyond.
Challenging, beautiful, and unforgettable – the Ogwen 15km is mountain racing at its most accessible.
Routes
Route Description
1. Start – Roman Road and climb of Cwm tryfan
The race starts on the flat, taking in the breathtaking views of the Ogwen valley as you head down valley on the Old Roman Road. The flat doesn't last long as you turn left and head up the technical climb of Cwm Tryfan with the peak of Tryfan looming over you.
2. Ridge traverse and descent
After cresting Cwm Tryfan, enjoy a ridge traverse rich with elevated views across to the Carneddau skyline as you approach the highest point of the course at the summit of Y Foel Goch(805m).
3. Return leg to Plas y Brenin
Completing the loop, the terrain steadily transitions back into the Ogwen Valley’s gentler gradients via some grassy, often wet hillside. The final stretch retraces toward Plas y Brenin, where your finish is framed by surrounding peaks; a satisfying conclusion to a scenic and physically challenging mountain route.
Pricing
Tier 1 Price
Ends: 31/08/2025
- £35.99
Tier 2 Price
Ends: 31/12/2025
- £37.99
Tier 3 Price
Ends: 05/04/2026
- £39.99
Tier 4 Price
Ends: 10/04/2026
- £42.99
Important Information
What's Included
Age
Mandatory Kit
Registration
Start Time
Feed Station
Cut Off Times
Prizes
We are proud that all our events are bilingual. Signs, registration and commentary are available in English and Welsh.
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