A 100 mile mountain ultramarathon in Eryri (Snowdonia) centred on Yr Wyddfa (Snowdon), traversing rugged terrain including summits, ridgelines and deep valleys. The route includes substantial cumulative ascent across multiple major climbs, with technical sections typical of the region’s mountain paths. Surfaces range from rocky trail to rough ground, with exposure on higher sections. Navigation requirements, checkpoints and aid station support are defined by the organiser’s official race information.

• Other races at the same event:
Yr Wyddfa Snowdon Ultra 50