Yr Wyddfa Sea to Summit
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Yr Wyddfa Sea to Summit Mountain Ultramarathon
This one‑day Sea to Summit ultramarathon starts at Caernarfon Castle and finishes at Bron y Feds Uchaf, Rhyd Ddu (LL54 7YS). The published distance is 29 miles (47 km) with approximately +5600 ft of elevation gain. The route follows quieter southern approaches to Yr Wyddfa, ascending via the Watkins Path and South Ridge and descending via the Ranger Path.
The course is fully waymarked with bright orange arrows and is supported throughout. Professional medical cover is provided on site by a qualified team of paramedics and doctors. Pit Stops supply basic items such as water, hot drinks, salty snacks, sweets and fruit; these are intended to supplement personal nutrition. A mandatory kit list is provided by the organiser.
Cutoffs are set at a 3 mph completion pace. There are three main pit stops; PS2 includes an official short-route option to the summit that reduces the total distance to 20.5 miles with 5175 ft of ascent, and participants who miss the PS2 cutoff will be routed via this option. Participants must be over 18 on the day of Registration.
Completing all three Sea to Summit events results in a Trilogy medal. A Trilogy pass offers entry to all three events in the same year and has specific transfer and usage conditions. Parking and shuttle options are available between the finish and the start, with prebookable passes and shuttle seats. Visit the organization's website for the most recent information.
