Trail Running Calendar Wales 2026-2027

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.

A *50 km* trail on the marked Brenig Way from Corwen to Llyn Brenig dam, with 1450 m ascent, varied upland and forest terrain, three checkpoints, required kit and GPS trackers provided.

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 races at Oxwich Bay with a self-navigated half marathon plus marked 10k and 5k routes. The event is postponed and a new date will be announced.

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.

Snowdon, Cadair Idris and Pen y Fan are linked in a 17 mile route with 2,334 m of ascent, usually completed in about 19 hours. Guided options include mountain leaders, transport between peaks and on-route support.

A guided 13 km loop around Llyn Trawsfynydd in Southern Snowdonia on runnable trails, led at a steady pace with regular regrouping stops; organised by OutFit with standard and member entry options.

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 challenge on Pen y Fan with three ascents using six different routes. Two categories are offered, including a 16 kg weighted option, and navigation between control points is the participant's responsibility.

Winter Sugar Loaf is a 9.6 km fell race near Abergavenny on 31 October 2026 with 485 m of ascent; entry via Fabian4 costs £9. The route is partially marked, full WFRA kit is mandatory and limited parking is available.

Trail running event on Anglesey with Half Marathon and 10 km routes through Newborough Forest and along Llanddwyn Beach. The courses include pine forest, sandy trails and coastal views across the Menai Strait to Eryri.

Night fell race at Llandegla Forest covering 6.4 km with 229 m of climb. Entry is £5 on the day and runners must carry compulsory kit including a headtorch with at least two hours of light.

Trail races at Oxwich Bay on 7 November 2026 offering 10K, half, marathon and ultra routes across grass, moor, beach and rock. Finishers earn points toward the Endurancelife season leaderboard.

A mixed terrain running event around the Brecon Beacons on 7 November 2026, held across trail, mountain, canal and road. Three distances are offered and conditions in mid-November can range from bright sunshine to freezing temperatures with..

A 6 mile out and back fell race with 1900 feet of ascent around Rhobell Fawr, starting and finishing at Llanfachreth village hall. It opens the Meirionnydd Winter Race Series and requires full WFRA kit and fell shoes.

Experience a 30 mile ultra marathon through the heart of the Brecon Beacons featuring the summit of Pen y Fan. This trail event offers technical terrain and scenic reservoir views with a strict 200 runner limit.

A winter coast to coast ultra on the Llŷn Peninsula on 7 November 2026, with solo 37.5 mile and team of four entry options, organised by Pen Llŷn Ultras and offering age 16 plus eligibility and several entry extras.

A fell race from Cilcain Village Hall over 15.7 km with around 950 m of ascent, requiring navigational skills and prior experience; facilities include toilets and refreshments, and team entries have no charge.

Held in Porth Penrhyn, Bangor on 14-15 November 2026, Slate Trail Ultra offers two trail races of 147 km and 80 km along the Snowdonia Slate Trail with substantial elevation gain and organised aid stations.

Trail Half Marathon Wales runs in Margam Country Park and Forest on 14 November 2026, offering a fully marked half marathon and 10k on forest trails with checkpoints, safety cover, and included car parking.