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Yr Wyddfa Ultra 100

Name: Yr Wyddfa Ultra 100
Start: 2025-09-06
End: 2025-09-06
Location: Betws-y-Coed

Betws-y-Coed, United Kingdom • 6 Sep 2025

The Yr Wyddfa Ultra 100 is a challenging 102-mile ultramarathon held in Snowdonia National Park, Wales, featuring 5,788 meters of ascent across stunning mountainous terrain. The race starts and finishes in Betws-y-Coed and includes 10 well-supported checkpoints offering refreshments and medical aid. It is a self-navigation event requiring runners to carry mandatory safety and navigation kit.

With a 40-hour cut-off time, the race accommodates 250 participants and offers live GPS tracking. Finishers earn distinctive buckles based on their placement, and the event emphasizes safety, environmental care, and mountain experience. Entry is by application, requiring prior ultramarathon and mountain navigation experience. Visit the organization's website for the most recent information.

United Kingdom Wales Betws-y-Coed

Race information

Website

102 mi

5788 m+

Yr Wyddfa Ultra 100 Mile

Visit the organization's website for the most recent information.

Trail runs nearby

Saturday Sep 20

The Brutal Extreme Triathlon

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0 km

The Brutal Extreme Triathlon is scheduled for 20 September 2025 in Llanberis, North Wales. The event starts at Llyn Padarn and offers multiple distance options. Entrants may compete solo or as a relay team of 2–4 members. Relay teams must change the timing chip in the main HQ marquee and the mounta..

Saturday Sep 27

Town to Tower 10K

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Saturday Oct 18

Loggerheads Autumn Trails

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7 km

14 km

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Sunday Oct 19

Brenig Way 50K Trail Race

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The Brenig Way 50K Trail Race is a challenging ultramarathon that covers 50 kilometers through remote upland scenery in Wales. Starting in Corwen, participants follow a marked footpath along country lanes, forest tracks, and riverside paths, crossing notable landmarks such as Clocaenog Forest and Ll..

Sunday Nov 9

Anglesey Trail Half Marathon

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Sat - Sun Nov 15-16

Slate Trail Ultra

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88 km

145 km

The Slate Trail Ultra, organized by APEX Running, is a challenging trail running event set in the scenic Snowdonia region of Wales. It offers two main distances: a 145km (90mi) ultra with 3,900m+ elevation gain and an 88km (55mi) Ultra Tour of the Quarries with 2,700m+ elevation gain. The course fol..

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