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Snowdonia Trail Marathon Eryri

Llanberis, United Kingdom • 11-12 Jul 2026

Event overview

The Snowdonia Trail Marathon Eryri is a multi-distance trail running event held in Llanberis, North Wales on 11 and 12 July 2026. Races explore trails and climbs within Eryri (Snowdonia) National Park, passing Rhyd Ddu, Beddgelert, Nant Gwynant, Pen y Pass and Yr Wyddfa (Snowdon). The event village includes music, commentary, shopping, food, kit demonstrations and toilets. Signage and registration are available in English and Welsh.

Races and support

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

Chip timing with live online results is provided. On-course support includes marshals, signage, energy stations and support vehicles. The marathon and ultra are ITRA and UTMB-indexed. Finishers receive event mementos designed to reflect the location. A 500 m kids fun run (Jones o Gymru Dolbadarn Dash) takes place on the event field; entry is a suggested £3 donation on the day, with proceeds to the Llanberis Mountain Rescue Team. Visit the organization's website for the most recent information.

United Kingdom Wales Llanberis

Race information

Website Registration
UTMB 20K UTMB 50K
57 km
Snowdonia Ultra Trail Marathon Eryri
27 mi
Snowdonia Trail Eryri Marathon
13 mi
Snowdonia Trail Eryri Half Marathon
10 km
Snowdonia Trail Eryri 10k
Visit the organization's website for the most recent information.
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