Snowdonia Trail Marathon Eryri
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Snowdonia Trail Marathon Eryri
The Snowdonia Trail Marathon Eryri is a trail running event in Llanberis, North Wales, held on 11 and 12 July 2026. The event includes multiple race distances that start and finish in Llanberis. Routes pass through parts of Eryri (Snowdonia) National Park and include sections near Rhyd Ddu, Beddgelert, Nant Gwynant, Pen y Pass, and Yr Wyddfa (Snowdon). The marathon and ultra marathon are ITRA and UTMB indexed.
Distances and course
- 10K: 9.8 km
- Half Marathon: 12.9 miles
- Marathon: 27.3 miles
- Ultra Marathon: 57 km
The routes include trail terrain with climbs and panoramic views across the national park.
Event facilities and extras
The event features an event village with music, commentary, shopping, food, kit demos, and toilets. On-course support includes marshals, signage, energy stations, and support vehicles. Timing is by chip with live online results. Finishers receive event mementos. A children’s fun run, the Jones o Gymru Dolbadarn Dash, is a 500 m run on the event field with a suggested £3 donation, with proceeds to the Llanberis Mountain Rescue Team. Event services and signage are available in English and Welsh. Visit the organization's website for the most recent information.
