Yr Wyddfa Ultra 50 & 100

45 mile mountain trail ultramarathon through Eryri, featuring the ascent of Yr Wyddfa, technical trails and spectacular Welsh mountain scenery.

Date Saturday 5th September, 2026
Distance Ultra
LocationCae Llan/Village Green
Town/CityBetws-Y-Coed
AreaNorth Wales
Start postcodeLL24 0AE
Start time7:00am

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The Yr Wyddfa Ultra 50 is a challenging 45 mile mountain ultramarathon starting and finishing at Y Stablau in Betws-y-Coed. The route explores the heart of Eryri National Park, passing iconic locations including Tryfan, Yr Wyddfa, Glyder Fach, Glyder Fawr, Devil's Kitchen, Llyn Idwal, Llyn Crafnant and Llyn Geirionydd.

With approximately 2,800 metres of ascent across technical mountain trails, the event is designed for experienced ultrarunners with previous mountain running experience. The route is supported by checkpoints, live GPS tracking and mandatory safety requirements, creating a demanding but well organised mountain challenge.

The Yr Wyddfa Ultra 50 is one of Wales' premier mountain ultramarathons, attracting runners looking to test themselves in the rugged landscapes of Eryri. Spectacular scenery, technical terrain and an unforgettable route combine to create a true mountain running adventure.

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2025 - Yr Wyddfa Ultra 50 results
2024 - Yr Wyddfa Ultra 50 results
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