Marathon Eryri 2025

• Scenic Route: Explore Eryri National Park with views of Rhyd Ddu, Beddgelert, and Snowdon.
• Challenging Terrain: 27-mile course with 1,685-meter ascent.
• Global Recognition: Part of the XTERRA Trail Run World Championship and UTMB-indexed.
• Essential Gear: Carry waterproof clothing, off-road shoes, and emergency items.
• Event Base: Starts and finishes in Llanberis, with registration near the Community Centre.

The Marathon Eryri is one of the most spectacular marathon courses in the UK, offering a challenging 26.2-mile route that circumnavigates the highest peak in Wales, Snowdon. This iconic marathon starts and finishes in the picturesque village of Llanberis. Runners traverse a mix of mountainous trails, scenic farm tracks, and tarmac roads while being surrounded by the breathtaking beauty of Snowdonia National Park. The course begins on the ancient Nant Gwynant road, navigates the hilly A4086 towards Pen-y-Gwryd, and continues to the charming village of Beddgelert. It then proceeds along the A4085 to Waunfawr before climbing to Bwlch y Groesa at around 1,200 feet, culminating in a dramatic descent back to the start in Llanberis. Renowned for its tough terrain and stunning views, Marathon Eryri has twice been voted as the best marathon in the UK. Beyond its challenging course, runners enjoy the camaraderie of a well-organized event, supported by enthusiastic local spectators. It's a race that appeals to those seeking a marathon with a difference—endorsed by scenic splendor and a supportive, festive atmosphere that echoes the heart of Welsh culture. Whether your goal is to enjoy the majestic views or conquer one of the UK's most formidable routes, Marathon Eryri promises an unforgettable running experience.

Expect temperatures between 48-58°F (9-14°C) with moderate wind during late October in Llanberis, Snowdonia National Park. Be prepared for occasional rain showers as the month progresses. With a mix of cloudy and clear spells, runners should dress for variable weather conditions.

The Marathon Eryri course is an exhilarating journey around Wales' majestic Yr Wyddfa (Snowdon), combining breathtaking scenery with formidable challenges. Starting in Llanberis, runners traverse a diverse mix of mountain trails, farm tracks, and tarmac. The route features notable climbs, including a grueling 270-meter ascent at Waunfawr that tests even the most seasoned athletes.

Key segments include the early climb at Pen-y-Pass, setting the stage for the demanding terrain ahead, and the picturesque village of Beddgelert, marking the halfway point. As participants circle Snowdon, they are treated to some of the UK's most stunning vistas. The marathon is not only a test of endurance but also a celebration of community spirit, with local supporters cheering runners along the way. This race promises an unforgettable experience for those ready to embrace its unique challenges.

Visiting Llanberis for the XTERRA Snowdonia Trail Marathon Eryri offers a perfect opportunity to explore the stunning landscapes and rich cultural heritage of Snowdonia National Park. Begin your adventure with a journey on the historic Llanberis Lake Railway, where a steam train ride provides breathtaking views of Yr Wyddfa (Snowdon) and the medieval Dolbadarn Castle. For history buffs, the National Slate Museum offers a fascinating glimpse into the Welsh slate industry, set within the atmospheric Victorian workshops of Dinorwig Quarry.

Immerse yourself in the natural beauty of the area by visiting Llanberis Falls, where the Ceunant Mawr waterfall cascades through lush temperate rainforest. For a truly memorable experience, hop on the Snowdon Mountain Railway, which climbs to the summit of Snowdon, offering spectacular vistas and access to the Hafod Eryri Visitor Centre. Outdoor enthusiasts can indulge in activities such as ziplining, white water rafting, and rock climbing, while craft shops and watersports on Llyn Padarn provide more leisurely pursuits.

Llanberis is not just about the great outdoors; it’s also a place where the Welsh language and heritage thrive. Explore the Llanberis Heritage Trails for a self-guided tour of the village's intriguing sites, or take a circular walk around Llyn Padarn. With its blend of cultural experiences and outdoor adventures, Llanberis is an ideal destination for marathon travelers looking to extend their stay and fully embrace the wonders of Snowdonia.