There are 4 upcoming half marathon races in Cardiff listed. Next up: The Cardiff 1.5k, 5k, 10k & Half Marathon MoRun (Sunday, 1 November 2026), Phoenix South Wales - Lest We Forget 2026 (Saturday, 14 November 2026), The Cardiff 5k, 10k and Half Marathon Winter Warmer Run (Sunday, 31 January 2027).
Upcoming races only, soonest first. Confirm dates and entry details with the organiser.
Cardiff · North Road, Cardiff CF10 3DX, UK
The Cardiff 1.5k, 5k, 10k & Half Marathon MoRun is organised by The Fix Events UK in Cardiff. Entry options: 5k MoRun; 10k MoRun; Half Marathon. The course surface has not been confirmed.
£30–£35
See entry options & fees
Cardiff · Harbour Drive, Cardiff, CF10 4, United Kingdom
Phoenix South Wales - Lest We Forget 2026 is organised by Phoenix Running South Wales in Cardiff. Entry options: 7 Hour Timed Event Including 5km, 10km, Half Marathon, Marathon, Ultra.
£35
See entry options & fees
Cardiff · Bute Park, North Road, Cardiff, UK
The Cardiff 5k, 10k and Half Marathon Winter Warmer Run is organised by The Fix Events UK in Cardiff. Entry options: 5 km; 10 km; Half Marathon. The course surface has not been confirmed.
£25–£30
See entry options & fees
Cardiff
One of the UK's biggest half marathons, through the Welsh capital.
Price not confirmed
Work out your target half marathon time and pace.