Snowdonia Trail Marathon Eryri
Llanberis, United Kingdom • 11-12 Jul 2026
Snowdonia Trail Marathon Eryri
The Snowdonia Trail Marathon Eryri takes place in Llanberis within Eryri (Snowdonia) National Park on 11 and 12 July 2026. The event offers multiple trail race distances that use routes visiting Rhyd Ddu, Beddgelert, Nant Gwynant, Pen y Pass and Yr Wyddfa (Snowdon).
Available distances include:
- 10K (9.8 km)
- Half Marathon (12.9 miles)
- Marathon (27.3 miles)
- Ultra Marathon (57 km)
The marathon and ultra are ITRA and UTMB indexed. The event provides chip timing with live online results. On course support includes marshals, signage, energy stations and support vehicles. The event village features music, commentary, shopping, food, kit demonstrations and toilets. Finishers receive themed mementos reflecting the event locations and local history.
A 500 m children’s fun run called the Jones o Gymru Dolbadarn Dash runs on the event field. Entry for the kids run is a suggested donation of £3 on the day, with proceeds supporting the Llanberis Mountain Rescue Team. The event is bilingual with signs, registration and commentary available in English and Welsh. Visit the organization's website for the most recent information.