Yr Wyddfa Ultra

SEP
5
2026
A 102 mile self navigation ultra across Snowdonia with 11 checkpoints, live GPS tracking, mandatory mountain kit and a 42 hour cutoff.
Sat 5 Sep 2026
ITRA 3–6

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Yr Wyddfa Ultra 100 (Snowdon Ultra 100)

The Yr Wyddfa Ultra 100 is a 102 mile mountain ultramarathon through Snowdonia Eryri National Park with approximately 5,172 m of ascent and a race cut off of 42 hours. The route starts and finishes at Betws‑y‑Coed and passes through places such as Beddgelert, the Nant Gwynant valley, Sygun Copper Mine, Llyn Dinas and Llyn Gwynant. The course includes 11 checkpoints providing food, drink and medical cover, and live GPS tracking is used to follow runners on the route. The event is run as a self navigation race and updated GPX files are published for the route.

Entry is limited to 150 places and the published entry fee is £209. The race requires entrants to be at least 20 years old, fit, and to have completed a prior organised 50 mile ultramarathon in mountainous terrain. Competent map and compass navigation is required.

Mandatory kit must be carried at all times and will be checked; required items include hardcopy maps, compass, waterproofs, headtorch and backup light, 1 litre minimum water capacity, survival shelter, emergency rations and a fully charged mobile phone in a waterproof bag. A dropbag service is provided to two checkpoints and a single pacer is permitted from the halfway checkpoint. Checkpoints have enforced cutoffs and failure to check in results in disqualification. Finishers receive tiered buckles by finishing position and trophies are awarded to the top three male and female finishers. Visit the organization's website for the most recent information.

Yr Wyddfa Ultra 100

Events nearby

A hill race near Porthmadog covering 7.2 km with 564 m of ascent, partially marked and requiring navigational skills and experience. Entry is day only for £5 and teams may enter free.
A 14.5 km fell race from The Gladstone near Penmaenmawr with 855 m ascent on partially waymarked upland terrain; competent navigation and mountain skills are required.
A six day 380 km multi stage ultra across the spine of Wales from Conwy Castle to Cardiff Castle with mandatory maps, trackers and overnight camps.
Guided mountain run across the 15 Welsh 3,000 ft peaks in Snowdonia, about 50 km with 4,000 m ascent, includes transport, guide and support; this is a non-race event.
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