Yr Wyddfa Ultra 50
Betws-y-Coed, United Kingdom • 5-6 Sep 2026
Yr Wyddfa Ultra 50 : Snowdonia ultramarathon
Yr Wyddfa Ultra 50 is a mountain ultramarathon based in Betws-y-Coed within Snowdonia Eryri. The published race distance is 45 miles with an overall cut-off of 20 hours and an advertised elevation of approximately 2800 m. Entry places are limited to 250 and the entry fee is £119.
The route follows the Snowdonia Slate Trail past Swallow Falls and climbs into the Glyderau and Snowdon areas, passing Tryfan, the summit of Yr Wyddfa, Glyder Fach and Glyder Fawr, Devil's Kitchen and Llyn Idwal, then continues beside Llyn Crafnant and Llyn Geirionydd. The event awards UTMB/ITRA mountain points and forms part of GB Ultras 50 mile series events.
There are five manned checkpoints providing refreshments such as cola, Tailwind mandarin orange, water, juice, sandwiches, salted potatoes, fruit, snacks and chocolate; vegetarian and vegan options are available. A medic or first responder is present at each checkpoint. Supporter access and parking are restricted at certain checkpoints and a single vehicle per runner is permitted in some areas.
Mandatory kit must be carried at all times and includes a hardcopy map for the local area, a waterproof coat with sealed seams, a baseplate compass, 1 litre minimum fluid capacity, a charged mobile phone in a waterproof bag, a headtorch (min 75 lumens), a backup light (min 25 lumens), emergency rations (min 500 calories), a survival or bivi bag and warm clothing. Random kit checks take place and failure to carry required items can lead to disqualification.
Participants must be at least 20 years old and demonstrate previous ultramarathon and mountain experience; applications are reviewed individually. Pacers and support runners are not permitted. Medal categories are awarded by finishing position with Gold for the first 200 finishers, Silver for 201 to 400 and Bronze thereafter. Visit the organization's website for the most recent information.