Wales
Trail Running Calendar Wales 2026-2027
Explore the best trail runs in Wales for 2026-2027! Our updated list features 163 exciting trail runs across the region. Find your next trail run in Wales below and join the trail community at these great events!
September 2026
A scenic, hilly trail half marathon in the Cothi valley near Pumsaint, offering a 13 mile race, a 6.5 mile alternative and a kids race, based at Pumsaint Village Hall on 20 September 2026.
A five mile mixed-terrain race through Porthkerry Country Park with varied surfaces, two climbs and inclusion in the South Wales Regional Trail Championship.
A multi day 286 km mountain race across Wales with solo and team entries, five indoor checkpoints and a 108 hours time limit.
Three coastal trail races on 26 September 2026 around the Gower Peninsula offer routes of 50, 34 and 23 miles along cliffs, bays and coastal paths. The event is self navigated with checkpoints, GPS tracking and coach transfers to starts.
Late September fell run from Canolfan Ceiriog Centre covering 11.6 km with 425 m ascent, on the day registration £6 and centre facilities including soup, cake and showers.
A fell running race in Caerphilly on 26 September 2026 featuring a 9.5 km course with 336 m of climb, partially marked and with a short walk from parking to the start.
A fully waymarked, supported Sea to Summit ultramarathon from Caernarfon Castle to Yr Wyddfa covering 29 miles and 5600 ft ascent.
Trail race at Margam Country Park offering 5 km and 10 km routes through woodland with castle views. The event features chip timing, water stations, a finisher's medal and parking included with entry.
Breidden Hills Race is an 11.5 km fell event near Criggion with 790 m ascent on 27 September 2026; pre-entry only, entry fee £8.
Guided trail run of about 10 km from Llangollen that visits Castell Dinas Bran and the Abbey, returning along the canal at a steady pace with regular regrouping stops.
October 2026
A mixed terrain 9 mile loop in Bridgend where runners complete as many laps as possible within an 8 hour time limit.
A 7 hour Time Challenge at Dare Valley Country Park with flexible distances from 3 km to ultramarathon options. Finishers receive a themed medal, distance pins and refreshments including doughnuts and ice cream.
A fell race on 3 October 2026 with a 3.2 km route and 305 m climb near Storey Arms, included in the South Wales Series; entry on the day £2.
Uphill only 10 km from Ruthin to Moel Famau finishing above 550 m, featuring varied trails, a steep final gully and an optional bus return to Ruthin.
A capped 32 mile trail in the Cambrian Mountains based at Camp Plas, fully marked with on-route support, checkpoints, camping and onsite weekend facilities.
A seaside hill race from Aberystwyth Promenade with a senior 11.7 km course including Pen Dinas and Consti climbs, plus junior races for ages 7 to 15.
A multi-terrain 10 km race or walk around Llandybie on 11 Oct 2026 with steep climbs, a walking option, limited entries, and proceeds going to charity.
Trail running at Loggerheads Copuntry Park with 6 km, 6 km Canicross and 12 km options, fully marked courses and no time limits.
A seven hour Time Challenge at Dare Valley Country Park offering distances from 3km to 50km, themed finisher medals and distance pins, on course aid with vegan options, and basic venue facilities including toilets and free parking.
Cadair X is a 13.1 mile mountain half marathon with 1165 m of ascent that climbs to the 893 m summit of Cadair Idris. The marked route crosses woodland, glacial lakes and technical summit terrain and a GPX file is available.