Llanberis
Trail Running Calendar near Llanberis 2026-2027
Explore the top trail runs near Llanberis for 2026-2027! We've gathered 37 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
August 2026
A hill race near Porthmadog covering 7.2 km with 564 m of ascent, partially marked and requiring navigational skills and experience. Entry is day only for £5 and teams may enter free.
September 2026
Coastal ultra events on Anglesey offering a 130-mile clockwise island circumnavigation and a separate ~47-mile coastal route along the Isle of Anglesey Coastal Path.
A self navigation 102 mile ultramarathon across Snowdonia with live GPS tracking, 11 checkpoints, mandatory mountain kit and a 42 hour cut off.
A 9 mile fell race with 2,800 ft ascent visiting Tal y Fan and Moel Lus, based at The Gladstone in Dwygyfylchi; entry is limited to 100 competitors.
A six day 380 km multi stage ultra across the spine of Wales from Conwy Castle to Cardiff Castle with mandatory maps, trackers and overnight camps.
Guided mountain run across the 15 Welsh 3,000 ft peaks in Snowdonia, about 50 km with 4,000 m ascent, includes transport, guide and support; this is a non-race event.
An 8 km mountain race over the three peaks of the Eifl near Pwllheli with about 490 m of ascent. Main race for over 16s with entry on the day £10; junior races are held with a £3 entry.
Coastal trail races in Abersoch, North Wales offering 20K and 10K routes across tracks, trails and beach with chip timing, drink stations and post-race music and facilities.
Lake to mountain triathlons in Llanberis with swim laps in Llyn Padarn, 28 mile bike laps and a mountain ascent of Yr Wyddfa.
Fell race from Llanberis across major Eryri summits including Snowdon with full (28 km, 2600 m) and half (14 km, 1350 m) course options.
A multi day 286 km mountain race across Wales with solo and team entries, five indoor checkpoints and a 108 hours time limit.
A fully waymarked 29 mile sea to summit ultramarathon from Caernarfon Castle to Rhyd Ddu with full support, pit stops and a Sea to Summit medal.
October 2026
A guided 13 km loop around Llyn Trawsfynydd in Southern Snowdonia on runnable trails with limited ascent and regular regrouping stops.
November 2026
Trail running in Newborough Forest and Llanddwyn Island with 10k and half marathon options, chip timing and on course support.
6 mile out and back fell race from Llanfachreth village hall, 579 m ascent to the summit, opening the Meirionnydd Winter Series and listed in the WFRA North Wales Series Final.
A Snowdonia trail event in November 2026 with a 147 km and an 80 km route, significant elevation gain, aid stations, drop bags and set cut off times.
A guided 55km route on Anglesey taking in three of the island's highest tops, with over 2000 m ascent, checkpoint support and a wooden finishers medal.