Snowdonia Trail Marathon Eryri 2026
Sign up for this event
Event type
Marathon
Event date
11 and 12 July 2026
The Snowdonia Trail Marathon Eryri is an unforgettable mountain running adventure set in the heart of Wales’ outdoor capital, Llanberis. Featuring a Trail Marathon, Ultra Marathon, Half Marathon, and 10K, this iconic event invites runners to take on one of the UK’s most breathtaking and challenging trail races.
Each route showcases the very best of Eryri (Snowdonia) National Park, combining rugged trails, sweeping panoramic views, and exhilarating climbs that captivate outdoor enthusiasts from around the world. Passing through Rhyd Ddu, Beddgelert, Nant Gwynant, Pen y Pass, and Yr Wyddfa (Snowdon), the Snowdonia Trail Marathon Eryri offers an experience — and scenery — unlike any other race in the UK.
Your support will help bring better treatments closer to home for patients across Wales.
Join #TeamCRW today and help change the future for the cancer patients of tomorrow in Wales. Rest assured we will be with you every step of the way.
Shortly after registering you will be given a dedicated contact here at Cancer Research Wales who will support you through every step of this exciting journey.
Your race entry will also include:
- Bespoke fundraising pack
- Regular event updates
- Support from our #TeamCRW Facebook group
- Information on Cancer Research Wales’ latest research projects
- Branded Cancer Research Wales running t-shirt (when 50% of fundraising target has been achieved)
- An opportunity to create a better future for people living with cancer in Wales
By registering for this event with Cancer Research Wales, you agree to the Participant Terms and Conditions, and agree to share your data with the event organisers and partners.
