About the event
On September 6, 2025, the Yr Wyddfa Ultra 100 Mile will push ultrarunners to their absolute limits as they traverse 100 miles of rugged, mountainous terrain in Snowdonia National Park. With a grueling 5,788 meters of ascent, this GB Ultras-organized event demands exceptional endurance, skill, and determination as participants navigate over challenging peaks, including the iconic Yr Wyddfa (Snowdon). The course offers both awe-inspiring views and extreme physical challenges, making it one of the most respected ultra-marathons in the UK. This race is a true test of willpower and resilience, designed for those who seek to conquer the toughest terrains.
Date:
Sat
Sep 6
2025
Location:
Distance:
Elevation profile:
Hilly
Website:
LinkElevation gain:
Number of participants:
150
Find the best training plan for your goals and the distance you’re planning to run:
Stories from Runnas
The Yr Wyddfa Ultra 100 Mile, scheduled for September 6, 2025, is a formidable race through the majestic landscapes of Snowdonia National Park, boasting an elevation gain of 5,788 meters. Organized by GB Ultras, this race challenges runners to conquer some of Wales' most iconic peaks, including the summit of Yr Wyddfa (Snowdon), in one of the toughest ultra-marathons in the UK.
If you are an official race organiser with any questions about this page, please get in touch: races@runna.com
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