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There are 3 upcoming half marathon races in Carmarthenshire listed. Next up: Brechfa Trail Races (Saturday, 13 March 2027), The Pendine Sands Races (Sunday, 11 April 2027), Llanelli Half Marathon & 10K (Sunday, 23 May 2027).
Upcoming races only, soonest first. Confirm dates and entry details with the organiser.
Carmarthen · Keeper's Lodge, Carmarthen, SA32 7, United Kingdom
Brechfa Trail Races is organised by Ridge Runners in Carmarthen. Entry options: Brechfa Forest Half; Brehfa Forest Marathon.
£45–£55
See entry options & fees
Work out your target half marathon time and pace.
Carmarthen · Pendine Sands, Carmarthen, UK
The Pendine Sands Races is organised by Every Mile Counts in Carmarthen. Entry options: Half Marathon; 10 km; 5 km. The course surface has not been confirmed.
£30–£40
See entry options & fees
Llanelli
Closed-road half marathon and 10k starting and finishing in Llanelli, partly on the coastal path.
Price not confirmed