Yr Wyddfa Ultra 50

Betws-y-Coed, United Kingdom • 6 Sep 2025

The Yr Wyddfa Ultra 50 is a challenging 45-mile ultramarathon held in Snowdonia National Park, Wales, starting and finishing in the picturesque village of Betws-y-Coed. Featuring 3,254 meters of ascent, the mountain trail course includes iconic landmarks such as Heather Terrace on Tryfan, the summit of Yr Wyddfa (Snowdon), Glyder Fach and Glyder Fawr, Devil’s Kitchen, and Llyn Idwal, before following scenic trails alongside Llyn Crafnant and Llyn Geirionydd. The event accommodates 500 runners with a 21-hour cut-off time and requires participants to have prior ultramarathon and mountain experience. Support is provided at five checkpoints, and mandatory mountain safety kit is required throughout the race. Visit the organization's website for the most recent information.

Race information

UTMB 100K UTMB 100M
45 mi
3254 m+
Yr Wyddfa Ultra 50
Visit the organization's website for the most recent information.
Trail runs nearby

Open to Offas is a well-established walking and running challenge held in northeast Wales, starting from Cilcain Village Hall. Participants can choose from three distances: 32 miles, 24 miles, or 15.5 miles. The scenic routes ascend the Clwydian Hills and follow the Offa's Dyke Path along the ridge,..

Moel Famau 24 is a unique 12- or 24-hour endurance event held on the iconic Clwydian Hill of Moel Famau, featuring a challenging 7.2 km loop with 500 meters of ascent per lap. Participants, including solo runners and teams, aim to complete as many laps as possible within their chosen time frame. The..

The Montane Dragon's Back Race® is a legendary and grueling 6-day ultra running event covering 380 kilometers with 16,400 meters of ascent along the spine of Wales. Starting at Conwy Castle and finishing at Cardiff Castle, it is widely regarded as the world's toughest mountain race. The course chall..

UTMB Index

The Dee Way 120 is a challenging ultra-distance trail race following nearly the entire 120-mile course of the River Dee from Llanwchllyn to Prestatyn in North Wales. The route traverses diverse and scenic landscapes, including valleys, historic villages, and coastal paths, offering breathtaking view..

The RunThrough Snowdonia Sea2Sky Trail Races, held in September 2025 at Barmouth, UK, offer two challenging distances: 25k and 53k. Set in the stunning landscape of Snowdonia, participants can enjoy breathtaking trail views while tackling a well-marshalled course. The event features chip-timed resul..

UTMB Index

The Yr Wyddfa Ultra 100 is a challenging 102-mile ultramarathon held in Snowdonia National Park, Wales, featuring 5,788 meters of ascent across stunning mountainous terrain. The race starts and finishes in Betws-y-Coed and includes 10 well-supported checkpoints offering refreshments and medical aid...