Yr Wyddfa Sea to Summit2026

26.09.2026Caernarfon (United Kingdom)

Pacing, fueling and crew sheet for the course you pick

1’707 m D+

46.7 km29 milongest of 2 courses

2 courses

GPX trace not yet published.

Race plan

Pacing, aid stations and fueling timed to your effort on Yr Wyddfa Sea to Summit, in one roadbook.

A fully waymarked mountain ultramarathon in Wales, starting at sea level in Caernarfon Castle and ascending to the summit of Yr Wyddfa.

Find a place to stay near Caernarfon for the race.

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