Caernarfon Half Marathon
Below are the key details about the running event along with a Google map & search link.
* This event was last held on 06 Sep 2026 - new dates haven't been announced yet *
- When
- 06 Sep 2026
- Distances
- Half Marathon
- Location
- Caernarfon Castle, Caernarfon
- Terrain
- Road
About Caernarfon Half Marathon
A 13.1 mile road half marathon set in North Wales, the Caernarfon race takes place on 6 September 2026 with the start and finish beside the historic Caernarfon Castle. The route combines the castle's striking setting with a varied course around the town and surrounding landscape, featuring several small climbs offset by longer downhill sections.
The event forms part of Run Wales' Four Castles Half Marathon Series, welcoming both standalone runners and those taking on the wider series. Drink stations are spaced at roughly three mile intervals, with marshals and course signage marking the way throughout. Some sections remain open to traffic while others benefit from road closures.
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