Snowdonia Sea2Sky
The Snowdonia Sea2Sky Ultra Marathon on 5 September 2026 is based from Barmouth on the coast of Eryri National Park.
Starting and finishing on Traeth Abermaw Beach, the 53km route heads out over the Barmouth footbridge and joins the Mawddach Trail, ascending Cader Idris before looping back to Barmouth.
Other distances include a 25km and 12km trail run.
This is a cup-free event – bring your own cup/water bottle for refilling at aid stations during the race.
Organiser
Series
RunThrough Trail Events
– Next in series (12 September 2026)
– Previous in series (30 August 2026)
Distances/Events
12K
25K
~ 53K Ultra
Source: https://www.runningcalendar.co.uk/event/snowdonia-sea2sky/
Event Website: https://www.runthroughtrails.com/snowdonia-sea-2-sky/
Coordinates: 52.7207132, -4.0570973