Snowdonia Half Marathon

Snowdonia Half Marathon

Sunday, 9 May 2027

Llanrwst, Conwy, Wales, UK

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The Snowdonia Half Marathon on 9 May 2027 is one the UK's toughest half marathons, and is part of the Four Castles Series.

This scenic but challenging 13.1 mile course is set in Snowdonia National Park, North Wales, starting and finishing in the village of Llanrwst.

The park is a region of haunting beauty and grandeur, of wild rocky mountains, hidden valleys, cascading rivers, still glacial lakes and deep forests.

Organiser

Run Wales

Series

Four Castle Series
- Previous in series (15 November 2026)

Distances/Events

Half Marathon

Location map

Refer to the event website for start line and course map.

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

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This listing was last manually checked on 11 May 2026.

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