Llanberis
Trail Running Calendar near Llanberis 2026-2027
Explore the top trail runs near Llanberis for 2026-2027! We've gathered 40 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
July 2027
Trail races in Eryri (Snowdonia) from 10K to 56.6 km, starting and finishing in Llanberis with an event village, chip timing and a kids 500 m fun run.
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.
Guided mountain run over the 15 Welsh 3,000 ft peaks across Snowdon, Carneddau and the Glyderau, roughly 50 km with 4,000 m ascent; transport, guide and food included.
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.
A six day mountain race across Wales from Conwy to Cardiff covering 380 km and 16,400 m ascent, with two day route options and charity entry choices.
A 200 mile nonstop ultra along the Wales Coast Path from Portmeirion to St Davids with live tracking, checkpoints and a 120 hour cutoff.
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, supported Sea to Summit ultramarathon from Caernarfon Castle to Yr Wyddfa and finish at Rhyd Ddu, covering 47 km with about 5600 ft ascent.
October 2027
November 2027
Trail Half Marathon and 10K through Newborough Forest and Traeth Llanddwyn on 7 November 2027, with chip timing and an event village.
A 60 km winter loop on the Llŷn Peninsula following the Mariner’s Trail with individual and four person relay options, checkpoint support and a finisher medal.
July 2028
A 47 mile ultra from Barmouth to Llanidloes largely on National Cycle Route 8. It is Day 3 of the six day MTC CYMRUN, has a limited field and a minimum pace requirement, and includes tracking and a finisher medal.