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There are 3 upcoming half marathon races in Gwynedd listed. Next up: Bangor City 10K & Half Marathon (Sunday, 13 June 2027), Snowdonia Trail Half Marathon Eryri (Sunday, 11 July 2027), Caernarfon Half Marathon (Sunday, 5 September 2027).
Upcoming races only, soonest first. Confirm dates and entry details with the organiser.
Bangor · Bangor, Gwynedd, North Wales. LL57 1NW
Bangor City 10K & Half Marathon takes place in Bangor on 13 June 2027. Organised by Run Wales. Published venue: Bangor, Gwynedd, North Wales. LL57 1NW. Check the organiser’s booking page for the full route, start arrangements, age requirements and current entry conditions.
£36–£48
See entry options & fees
Work out your target half marathon time and pace.
Llanberis · Llanberis
Snowdonia Trail Half Marathon Eryri takes place in Llanberis on 11 July 2027. Organised by Always Aim High Events. A mountain half marathon starting and finishing in Llanberis, with approximately 1,250 metres of climbing. Start time will be confirmed in final instructions. Check the organiser for final race-day instructions.
£47.99–£49.99
See entry options & fees
Caernarfon · Caernarfon
Caernarfon Half Marathon takes place in Caernarfon on 05 September 2027. Organised by Run Wales. Published venue: Caernarfon. Check the organiser’s booking page for the full route, start arrangements, age requirements and current entry conditions.
£47
See entry options & fees