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!
October 2026
A 50 km trail race around Llyn Brenig from Corwen, using marked footpaths with GPS navigation, checkpoints and mandatory kit requirements.
Join the Aberfan Memorial Run in Merthyr Tydfil to honour the 1966 victims and support the Aberfan Memorial Charity. Choose 5 km to ultra on a scenic tarmac loop along the Taff Trail with flexible start times and official timing.
Trail event at Oxwich Bay on 18 October 2026 with a self navigated half marathon and marked 10 km and 5 km routes across coastal paths, woodland and sand dunes.
A memorial road and off road event organised by Green Events featuring a half marathon and a 12k in mountainous scenery. The race is cupless, open to those over 16, and lists online and on the day entry options.
A guided 13 km loop around Llyn Trawsfynydd in Southern Snowdonia on runnable trails with limited ascent and regular regrouping stops.
A series of mountain trail races across the Black Mountains and Brecon Beacons offering four distances from 21 miles to 100 miles. Routes combine marked sections, GPS navigation and staffed checkpoints with mountain safety cover.
A 32 km, 1800 m mountain run on Pen y Fan with three summit ascents and options for unweighted or 16 kg weighted categories; navigation is self managed.
A 9.6 km fell race with 485 m ascent near Abergavenny on 31 October 2026; full WFRA kit is required and parking at the pub is very limited.
Timed lap event at Barry Sidings Country Park with flexible start times, distances from 5 km to ultra on a tarmac out and back course and a medal or no medal option.
November 2026
Trail races at Newborough Forest and Llanddwyn Island, offering 10k and half marathon distances, chip timing, on course support and bilingual services.
A trail race on 1 November 2026 around Moel Famau with 17 km and 10 km routes, on‑site registration, mandatory kit and a focus on reduced single use plastic.
Approximately 7 mile multi-terrain race from Risca Leisure Centre to Twmbarlwm and back, with about 1000 ft ascent; entries listed via Entry Central.
An evening trail run in Llandegla Forest on 6 November 2026 covering 6.4 km with 229 m climb; partially marked course, compulsory headtorch and kit, £5 entry on the day.
Trail races at Oxwich Bay on 7 Nov 2026 offer 10K, half, marathon and ultra distances across cliffs, dunes, woodland and beaches.
Mixed trail, mountain, canal and road runs around the Brecon Beacons on 7 November 2026, offered at 50 miles, 26 miles and 13 miles.
A medium length fell race from Llanfachreth with a 6 mile route and 579 m ascent, forming the first event in the Meirionnydd Winter Race Series.
A 30 mile mountain ultra across the Brecon Beacons with five checkpoints, mandatory kit and 3750 ft / 1143 m of ascent.
Experience a 60 km winter ultra loop on the Llŷn Peninsula featuring coastal views, the historic Mariner's Trail, and the scenic peaks of Yr Eifl with solo and relay options.
A 14.2 km fell race with 910 m ascent around Cilcain, Category A kit requirements, limited parking and a staffed kit dump.