Marathons in Wales
Find marathons in Wales. Compare 10 upcoming events by date and location. Open a race guide for the course, recorded editions and official entry information where available.
Events to explore include Marathon Eryri, Beacons Trail Marathon, Half Marathon & Ultra and Endurancelife Gower.
Narrow your search to South Wales, Gwynedd and Merthyr Tydfil, or browse the other locations below.
10 listed events · 10 with upcoming dates
Upcoming marathons
10 matching events, earliest date first. Entry availability is shown separately.
Marathon Eryri
WALLlanberis, Gwynedd
Marathon Eryri — Llanberis, Gwynedd, Wales.
· Marathon
Race details, entry and past editions →Entry information ↗Beacons Trail Marathon, Half Marathon & Ultra
WALTalybont-on-Usk, South Wales
Half, Marathon trail running in Talybont-on-Usk.
· Marathon
Race details, entry and past editions →Entry information ↗Endurancelife Gower
WALGower Peninsula, South Wales
Half, Marathon, 5K, 10K mixed running in Gower Peninsula.
· Marathon · Status TBC
Race details, entry and past editions →Brechfa Trail Half Marathon & Marathon
WALBrechfa Forest, Carmarthen
Running event in Brechfa Forest, Carmarthen.
· Marathon · Status TBC
Race details, entry and past editions →Big Moose Ultra Fun Run
WALCardiff, Wales
Big Moose Ultra Fun Run — Bute Park, Cardiff. Listed on runABC (South of England).
· Marathon · Status TBC
Race details, entry and past editions →The Pendine Sands Races
WALPendine Sands, Carmarthanshire
Running event in Pendine Sands, Carmarthanshire.
· Marathon · Status TBC
Race details, entry and past editions →ABP Newport Marathon Festival 2027
WALNewport
ABP Newport Half Marathon — Newport, Wales.
· Marathon
Race details, entry and past editions →OTT Trail Marathon & 10 Mile Trail Race 2027
WALMerthyr Tydfil
OTT Trail Marathon & 10 Mile Trail Race 2027 — an officially published 10-mile fixture at Parkwood Outdoors, Dolygaer, Merthyr Tydfil.
· Marathon
Race details, entry and past editions →The Cryocube Wales Marathon
WALTenby, Pembrokeshire
The Cryocube Wales Marathon in Tenby.
· Marathon
Race details, entry and past editions →Great Welsh Marathon & Half Marathon
WALSouth Wales (venue TBC), South Wales
Great Welsh Marathon & Half Marathon in South Wales (venue TBC).
· Marathon · Status TBC
Race details, entry and past editions →Race archive
Past races and previous editions
Looking back at a race? Browse the guides below for recorded editions. This section also includes events awaiting a new date and cancelled editions. Previous editions of races in the upcoming calendar are available through their race guides above.
No separate archived race guides are listed for this selection yet.
View full race archive (0) →Choosing a race in Wales
The unfiltered upcoming calendar includes events in Brechfa Forest, Carmarthen (1), Cardiff (1), Gower Peninsula (1). Use the town filter to compare locations, then check the race guide for the start venue and organiser’s travel information.
Questions about marathons in Wales
Which marathons are coming up in Wales?
Marathon Eryri is listed for 24 October 2026. Beacons Trail Marathon, Half Marathon & Ultra is listed for 7 November 2026. Endurancelife Gower is listed for 7 November 2026 (status to be confirmed). Check the race guide and organiser’s latest information before making plans.
Where can I find race entry details for Wales?
Follow the link from the race guide to the organiser or entry provider, where one is available. Check the entry deadline, eligibility and current availability there. A listed race date does not necessarily mean entries are still open.
Why has a race moved out of the upcoming calendar?
Once its listed dates have passed, a race moves to the past-editions view unless another upcoming edition is recorded. Cancelled events also leave the upcoming list. The race guide stays available, and the event returns when a new date is added.