Snowdonia Sea2Sky

Snowdonia Sea2Sky

Saturday, 5 September 2026

Barmouth, Gwynedd, UK

Follow event Follow series Run/Walk Off Road/Trail

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

RunThrough

Series

RunThrough Trail Events
- Next in series (20 September 2026)
- Previous in series (8 August 2026)

Distances/Events

12K
25K
~ 53K Ultra

Location map

The Event HQ is at Traeth Abermaw Beach, Barmouth.

Please note: the map location may be approximate. Refer to the event website for start lines and course maps.

Disclaimer

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This listing was last manually checked on 20 January 2026.

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