Yr Wyddfa Ultra 100

The Yr Wyddfa Ultra 100 is a challenging 102-mile ultramarathon set in the stunning Snowdonia National Park, featuring an elevation gain of 5788 meters. Scheduled for September 6, 2025, the event allows 250 participants to navigate the mountainous terrain, with checkpoints providing essential support along the route. Runners must possess prior ultramarathon experience and demonstrate navigation skills, as the race is self-navigated.

A cut-off time of 40 hours is enforced, and finishers receive a buckle based on their placement. The event emphasizes safety, requiring mandatory gear and adherence to strict regulations. Visit the organization's website for the most recent information.