Trail runs in Gwynedd
Find trail runs in Gwynedd in 2026/2027 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.
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- Sat 11 - Sun 12 Jul
- £31.99-£319.99
Snowdonia Trail Marathon Eryri Events
Your chance to take on one of the UK’s most demanding and spectacular trail races, set deep in the heart of Eryri (Snowdonia) National Park, offering a true mountain challenge.
- 10K run
- Half marathon
- Marathon
- Ultra run 2
- Sat 25 - Sun 26 Jul
- FREE-£280
Ultra X Wales
Nestled in the hills of the Brecon Beacons, run or walk through wild hills on marked, rugged trails, with big views and remote landscapes in a supportive, adventure-focused trail running experience.
- Ultra run 4
- Multi-terrain run 2
- Fri 18 - Sat 19 Sep
- £5-£35
Dioni Abersoch Coast Trail
Immerse yourself in the stunning views of Abersoch bay at this iconic event which is well and truly on the trail running map, including 20K and 10K distances along tracks, trails and beach.
- Fun run 2
- 10K run
- Trail run
- Sun 1 Nov
- £28.99-£51.99
Anglesey Trail Half Marathon & 10K
Anglesey's most beautiful trail race, set in the stunning surroundings of Newborough Forest and Traeth Llanddwyn, which once hosted the Commonwealth Mountain and Ultra Distance Running Championships.
- 10K run
- Half marathon
- Sat 14 Nov
- £61.50
The Anglesey 3 Peaks Run Challenge
Run the three peaks of Anglesey: a guided 55km ultra linking the island’s highest summits on spectacular coastal and inland trails, finishing at beautiful Lligwy Beach.
- 55 km trail running
- Sat 4 Apr
- £28-£35
Aberdyfi Half Marathon | Half Marathon
- 21.1 km trail running + 850 m ascent
- Sun 19 Apr
- £24-£26
Trawsfynydd Lake Race | 8.6 Mile
- 8.6 miles multi terrain running
- Fri 4 Sep
- £125-£150
Ring O' Fire | Firelighter 50
- 47 miles multi terrain running