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Runs in Gwynedd
Find runs in Gwynedd in 2025/2026 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.
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- Sun 1 Mar 2026
- £9.99-£49.99
Anglesey, Isle of Anglesey, UK
Jones o Gymru Anglesey Half Marathon and 10K
The most beautiful half marathon in North Wales! Flanked by breathtaking views of Snowdonia and the Menai Straits, the beauty and uniqueness of this event is what draws people from all over the UK!
- Families
- Recycling
- Newcomers
- Plastic bottle free
- Music
- Event village
- Coast
- Free venue entry
- Sustainability policy
- Public transport links
- Plastic-free event
- Age 5 & over
- Fun run
- 10K run
- Half marathon
- Sat 11 - Sun 12 Jul 2026
- £31.99-£374.99
- Early bird
Caernarfon, Gwynedd, UK
Snowdonia Trail Marathon Eryri Events
Welcome to the Snowdonia Trail Marathon Eryri, a stunning Trail Marathon, Ultra Marathon, Half Marathon, 10K, and 24hr event starting and finishing in Wales' outdoor capital, Llanberis.
Early bird on now
- Families
- Recycling
- Newcomers
- Plastic bottle free
- Music
- Event village
- Event expo
- Mountains
- Free venue entry
- Sustainability policy
- Public transport links
- Plastic-free event
- Age 17 & over
- 10K run
- Half marathon
- Marathon
- Ultra run 2