Snowdonia Trail Marathon Eryri
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Event overview
The Snowdonia Trail Marathon Eryri takes place on 12 July 2026 in Llanberis, Eryri (Snowdonia) National Park, Wales. The event is organised by Always Aim High Events and is based at Y Ganolfan, Llanberis (LL55 4UR). Courses start and finish in Llanberis and pass through Rhyd Ddu, Beddgelert, Nant Gwynant, Pen y Pass, and Yr Wyddfa (Mount Snowdon). Signage, registration and commentary are available in English and Welsh.
Race details
Distances offered
- 10k - 9.8 km
- Half Marathon - 12.9 miles
- Marathon - 27.3 miles
- Ultra Marathon - 57 km
The Marathon and Ultra Marathon are UTMB-indexed races. On-course support includes marshals, signage, energy stations and support vehicles. The event village provides music, shopping, food and toilets. Race timing is chip timing with live online results.
A 500 m kids fun run, the Jones o Gymru Dolbadarn Dash, takes place on the event field; entry on the day carries a suggested donation of £3. All proceeds from the kids run go to support the Llanberis Mountain Rescue Team. Tickets for the main event were listed as sold out on the event page. Visit the organization's website for the most recent information.