Yr Wyddfa Ultra 50
Yr Wyddfa Ultra 50 is a 45 mile mountain ultramarathon held in Snowdonia Eryri, based in the village of Betws-y-Coed. The event in 2026 is the eighth edition, offers 250 places and uses a 20 hour overall cut off.
The route follows mountain trails and the Snowdonia Slate Trail, passing features such as Tryfan, the Yr Wyddfa summit, Glyder Fach and Glyder Fawr, Devil’s Kitchen, Llyn Idwal, Llyn Crafnant and Llyn Geirionydd. The course includes significant ascent and a mix of upland paths, woodland trails and some road crossings where roads are not closed.
Entry requires applicants to be at least 20 years old and to have prior ultramarathon and mountain experience; applications are reviewed case by case. Runners must be competent map readers and not solely reliant on GPS for navigation.
Mandatory kit must be carried at all times and is subject to random checks; required items include a hardcopy map, compass, waterproof coat and trousers, 1 litre minimum water, headtorch (min 75 lumens) plus a backup light, survival bag, emergency rations, fully charged phone in a waterproof bag and a GPS tracker provided at registration. Failure to carry mandatory kit or to check in at checkpoints may result in disqualification.
There are five checkpoints with refreshments and medical cover. Finishers earn UTMB/ITRA mountain points and receive Gold, Silver or Bronze finisher medals depending on finishing position. Visit the organization's website for the most recent information.
2026 RACE FULL. ENTRIES CLOSED
2026 RACE - PAY BY INSTALMENTS. RACE FULL - ENTRIES CLOSED
Course Records
- Mens PB – Mark Darbyshire (GBR) 2024: 9h 18m 13s
- Ladies PB – Jodie Smith (GBR) 2025: 11h 41m 51s
Medals
Top 200 finishers earn a Gold Yr Wyddfa Snowdon Ultra Medal, 201-400 finishers earn a Silver Yr Wyddfa Snowdon Ultra Medal and 401+ finishers earn the Bronze Yr Wyddfa Snowdon Ultra Medal. There are additional Bespoke GB Ultras Trophies for the Top 3 Male and Top 3 Female finishers. The Yr Wyddfa Snowdon Ultra is part of the GB Ultras 50 Mile SLAM and GB Ultras 50 Mile GRAND SLAM!
The Route
Runners follow the Snowdonia Slate Trail past Swallow Falls to the foot of the Eryri mountains and take on some of the toughest terrain in Wales! With live online GPS tracking from GB Race Tracker & #GBUltras support at checkpoints along the trail, it’s a race you’ll always remember! Finishers attain UTMB/ITRA Mountain Points, the race is a stunning challenge and a Navigation event. DOWNLOAD GPX – High Level GPX (Race Route) and Low Level GPX (Severe Weather) on the map above. Select the map choice on the top and the GPX becomes available.