RunThrough Snowdonia Sea2Sky
Barmouth, Gwynedd
12K, 25k, 53k, 54k Trail/Ultra
Commercial eventUltra
Organised by: RunThrough
Listed May 2026
About this race
The RunThrough Snowdonia Sea2Sky is an ultra marathon based in Barmouth, Gwynedd, taking place on Saturday 5 September 2026.
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