Trail running races in Gwynedd, Wales
Find trail running races in Gwynedd, Wales. Compare 4 upcoming events by date and location. Open a race guide for the course, recorded editions and official entry information where available.
Upcoming running events include 25K races.
Events to explore include Slate Trail Ultra & Ultra Tour of the Quarries, Eryri by UTMB® and Ultra Wales 50.
6 listed events · 4 with upcoming dates
Upcoming trail running races
4 matching events, earliest date first. Entry availability is shown separately.
Slate Trail Ultra & Ultra Tour of the Quarries
WALBangor, Gwynedd
Long mountain trail routes around the slate landscapes of Eryri.
· 147K / 80K · Status TBC
Race details, entry and past editions →Eryri by UTMB®
WALLlanberis, Gwynedd
Eryri by UTMB® — an official UTMB World Series Event.
· 163K / 78K
Race details, entry and past editions →Entry information ↗Ultra Wales 50
WALGanllwyd, Gwynedd
Ultra Wales 50 in Ganllwyd.
· 51mi
Race details, entry and past editions →Snowdonia Trail Marathon Eryri
WALLlanberis, Gwynedd
Snowdonia Trail Marathon Eryri in Llanberis.
· 9.8K
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.
RunThrough Snowdonia Sea2Sky
WALBarmouth, Gwynedd
RunThrough Snowdonia Sea2Sky in Barmouth.
Next date not listed
Race guide and recorded editions →Snowdonia Sea2Sky 12K, 25K & 54K
WALBarmouth, Gwynedd
Snowdonia Sea2Sky — Bath House, The Quay, Barmouth. Listed on runABC (North of England).
Next date not listed
Race guide and recorded editions →Choosing a race in Gwynedd
The unfiltered upcoming calendar includes events in Llanberis (2), Bangor (1), Ganllwyd (1). Use the town filter to compare locations, then check the race guide for the start venue and organiser’s travel information.
Questions about trail running races in Gwynedd
Which trail running races are coming up in Gwynedd, Wales?
Slate Trail Ultra & Ultra Tour of the Quarries is listed for 14 November 2026 (status to be confirmed). Eryri by UTMB® is listed for 14 May 2027. Ultra Wales 50 is listed for 19 June 2027. Check the race guide and organiser’s latest information before making plans.
What running distances are listed in Gwynedd, Wales?
Look for 25K races in the upcoming listings. If an event offers several distances, check the individual race guide to choose the edition and distance you want to enter.
Where can I find race entry details for Gwynedd, 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.