Snowdonia Trail Marathon Eryri
Always double-check with the organizer's website! This page may contain affiliate links.
Event details
The Snowdonia Trail Marathon Eryri is a trail running event held in Llanberis, Eryri (Snowdonia) National Park on 11 and 12 July 2026. The event includes a 10k, half marathon, marathon and ultra marathon. Routes start and finish in Llanberis and explore trails, panoramic views and climbs around locations such as Rhyd Ddu, Beddgelert, Nant Gwynant, Pen y Pass and Yr Wyddfa (Snowdon). The marathon and ultra marathon are ITRA and UTMB-indexed. The event is bilingual; signs, registration and commentary are available in English and Welsh.
Distances
- 10K - 9.8 km
- Half Marathon - 12.9 miles
- Marathon - 27.3 miles
- Ultra Marathon - 57 km
On-course and event features
The event village includes music, commentary, shopping, food, kit demonstrations and toilets. On-course support includes marshals, signage, energy stations and support vehicles. Chip timing and live online results are provided. Finishers receive themed mementos. A children’s fun run, the Jones o Gymru Dolbadarn Dash, is a 500 m run on the event field with a suggested on-the-day donation of £3; proceeds support the Llanberis Mountain Rescue Team. Visit the organization's website for the most recent information.
