Snowdonia Trail Marathon Eryri
Join North West Cancer Research and RunThrough for a run up Wales' highest peak.
Date: Sunday 12th July 2026
Entry Fee: From £40
Sponsorship: From £250
Location: Caernarfon, Wales
Take on a challenge with this tough ascent up Wales’ highest peak.
Ascending 1,685 metres over 27 miles of iconic and spectacular trails, the epic Snowdonia Trail Marathon Eryri circumnavigates and eventually climbs the slopes of Wales' highest peak - Yr Wyddfa (Snowdon).
This incredible route explores the trails, gorgeous panoramic views and tough climbs that make Eryri National Park such a popular destination for outdoor enthusiasts.
Distances Available
Half Marathon - £40 entry fee, £250 fundraising target
Marathon - £50 entry fee, £350 fundraising target
Why choose #TeamNWCR?
By running in aid of North West Cancer Research you'll be supporting life-saving cancer research across the North West and North Wales, as well as enabling the Charity team to reach communities across the region by visiting schools, clubs, and special interest groups to spread awareness of the cancers most prevalent in our region and educate on the ways to stay healthy.
Every penny raised directly supports our efforts to discover new treatments, improve patient care, and ultimately, find a cure for cancer.
As part of our team, you’ll receive fantastic support from the moment you sign up all the way until you cross that finish line. We'll provide you with a fundraising pack and unlimited support in the run-up to and during the event and reward you with a bespoke North West Cancer Research medal to commemorate your achievement!
For more info or support, please email [email protected] and we will get you on your way with your own fundraising page, as well as plenty of promotional graphics to share across your socials.