A 50 km mountain ultramarathon in Eryri combining steep climbs, rugged trail and technical descents typical of Snowdonia terrain. The course traverses high ground and valley paths with significant elevation for the distance. Underfoot conditions vary from rocky trail to rough mountain path. Aid stations are positioned along the route according to organiser guidance.

• Other races at the same event:
Ultra-Trail Snowdonia 100K
Ultra-Trail Snowdonia 100M