Event
Snowdonia Trail Marathon Eryri Half Marathon 2026
Run 4 Cancer in the Snowdonia Trail Marathon Eryri Half Marathon and help British families living with cancer. We have a range of subsidised charity places available. Sign up for your race place below! All our runners receive a training plan and the option of a Run 4 Cancer running vest.
- Help families living with cancer
- Subsidised entry fee
- Low minimum sponsorship
- Run with your friends
This is day 2 of the incredible Snowdonia Trail Marathon Eryri Weekend and time for the half marathon.
After the run, the lively event village is the place to relax, refuel, and soak up the atmosphere, with plenty of food, entertainment, and opportunities to connect with fellow runners. Take time to explore the charming village of Llanberis, set at the foot of Yr Wyddfa (Snowdon), and enjoy the dramatic scenery of Eryri (Snowdonia) National Park. Whether you’re aiming for a personal best or just a fun trail experience, the half gives you a taste of the weekend action!
Date
- 12th July 2026
The Route
This is one tough Half Marathon with over 1192m of ascent most of which is up Wales’ highest peak. The hills start almost immediately as you climb up through Llanberis and then Maesgwm, also known as Telegraph Valley. Turning left onto the Snowdon Ranger Path you have a further steep climb up before crossing the railway, reaching the Finger Stone and starting your descent down the Llanberis Path. The views, all the way to Anglesey, are incredible, but don’t get complacent you haven’t finished yet! Once back down at the road in Llanberis you are diverted through the woods past Dolbadarn Castle with the sting in the tail being the final climb up the infamous Zig Zag path and into the quarries. Reaching the top of Vivian Quarry you’ll be able to see the event village and the finish line down below and better yet, it’s pretty much all downhill to the finish from here.
Already Have Your Own Place?
If you already have your own place and would like to Run 4 Cancer, we would be delighted! We can fully support you with a training plan and a high performance Run 4 Cancer running vest… perfect for both training in and also for race day! Email us at Events@4cancer.org and we’ll get in touch right away! Thank you.
Guaranteed Entry
We have a very limited number of subsidised places available. All we ask is that you raise a minimum of £250.00 in sponsorship funds in support of Run 4 Cancer. We set very low minimum sponsorship levels and fully understand that the cost of living crisis is impacting people’s ability to sponsor people.
Sign up for your Half Marathon place here
Diolch!
Run 4 Cancer - About Us
Set up by a team of running enthusiasts, all of whom have lost a family member or a friend to cancer, Run 4 Cancer is primarily a provider of days out and short-breaks for British families affected by cancer. We give families something to look forward to during the most difficult of times. We also make grants to UK based care institutions and support research into the positive effects of exercise (e.g. running) and how it can help with cancer prevention and recovery. Find out more about us here.
Marathon Eryri Photos
