Marathons in Wales, United Kingdom
2 upcoming races are listed in Wales, including 1 marathon and 1 half marathon. The next is Cardiff Half Marathon on October 4, 2026.
October has the most races. Race pages link the official source where we have one. Confirm dates and prices with the organizer before you register.
2
Races listed
1
Marathons
October
Busiest month
25 May
Last updated
| Date | Race | City | Distances | From |
|---|---|---|---|---|
| 4 Oct 2026 04Oct 26 | Cardiff Half Marathon | Cardiff | 21.1K | £35–£50 |
| 24 Oct 2026 24Oct 26 | Marathon Eryri | Llanberis | 42.2K | £48–£55 |
Go a level deeper
Links go down the map, not sideways. Each region and city has its own page of races.
Cities
Common questions
When is the next race in Wales?
Cardiff Half Marathon on October 4, 2026. The table above lists every upcoming race in date order.
Which months are busiest in Wales?
October (2), counting every upcoming race listed in Wales.
Which distances can I run in Wales?
The listed races include 1 marathon and 1 half marathon. Many events offer more than one distance on the same day.
How do I confirm a race’s details?
Open the race page and check its provenance ledger, which shows where each fact came from. Then confirm the date, price and entry rules with the organizer before you register or book travel.
Spotted something wrong on this page?
Dates and prices move · tell us and we check the organizer’s source