Gwynedd
Trail Running Calendar near Gwynedd 2026-2027
Explore the top trail runs near Gwynedd for 2026-2027! We've gathered 43 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
July 2027
A 300 mile nonstop ultra along the Cambrian Way with 78,740 ft of ascent, 11 aid stations, running from Cowny to Cardiff over 8.5 days.
Trail races in Eryri from 10K to ultra start and finish in Llanberis, with mountain routes, on course support, an event village and a kids fun run supporting local rescue.
A 15.35 km mountain race on 17 July 2027 with 994 m of ascent; entrants must be over 18 and have mountain running experience.
Mountain races in Eryri's Ogwen Valley offering 40K, 25K and 15K routes from Plas y Brenin with marked trails, on course support and chip timing.
A guided traverse of all 14 Snowdonia peaks over 3000 ft covering about 50 km and 4000 m ascent with run and walk pace options.
August 2027
Backyard ultra on the Llŷn Peninsula where runners complete an hourly loop and continue as long as they wish, with free camping and a Black Sheep medal included.
Coastal ultramarathons on the Wales Coast Path offering 100 km and 100 mile options with marked checkpoints, significant elevation, mandatory safety kit, drop bags and live tracking.
September 2027
Coastal ultra events on Anglesey including a 130 mile island circumnavigation and a 47 mile coastal stage, both following the Isle of Anglesey Coastal Path with checkpoints.
A 45-mile mountain ultramarathon across Snowdonia, following high trails over Tryfan and Yr Wyddfa with five checkpoints and required mountain kit.
Six-day mountain event from Conwy to Cardiff, featuring The Dragon at 380 km and 16,400 m ascent, plus two-day Fire and Tail options.
A 200 miles non stop ultramarathon along the Wales Coast Path from Portmeirion to St Davids, with checkpoints about every 25 miles, trackers and three optional sleep stations.
A lake to mountain triathlon in Llanberis, North Wales offering standard, half, full and double distances with solo or 2 to 4 person team options.
A 24 hour multi-lap endurance race on a 5 km coastal trail at Abersoch, with solo and two-person relay options and on-site support.
A fully waymarked, fully supported sea to summit ultramarathon from Caernarfon Castle to Rhyd Ddu covering 29 miles and about 5600 ft of ascent.