Snowdonia Trail Marathon Eryri

Snowdonia Trail Marathon Eryri

Snowdonia Trail Marathon Eryri is a multi-distance trail event held in Llanberis within Eryri (Snowdonia) National Park on 11 and 12 July 2026. The event offers routes that travel through mountain trails, valleys and views around Yr Wyddfa with sections visiting Rhyd Ddu, Beddgelert, Nant Gwynant and Pen y Pass.

Available race distances include:

• 10K - 9.8 km
• Half Marathon - 12.9 miles
• Marathon - 27.3 miles
• Ultra Marathon - 57 km

The marathon and ultra routes are ITRA and UTMB indexed. Race services listed for participants include chip timing with live online results, on-course support from marshals, signage, energy stations and support vehicles, plus unique finisher mementos. An event village provides music, commentary, shopping, food, kit demonstrations and toilets. Family friendly elements include family finishes and a 500 m kids fun run called the Jones o Gymru Dolbadarn Dash; entry on the day is a suggested £3 donation with proceeds to the Llanberis Mountain Rescue Team.

The event operates bilingually with signs, registration and commentary available in English and Welsh. Organisers note travel, accommodation and local information are provided separately for visitors and residents. Visit the organization's website for the most recent information.