Trail Running calendar near Merthyr Tydfil 2025-2026

We have found 253 Trailruns within 80 miles of Merthyr Tydfil. See below where and when you can find the races.

Woodchester Trail Challenge on 6 September 2026 is a demanding eight mile hilly woodland run through Woodchester Park with a new start and route. Expect a metal finisher medal and a strict two hour cut off.

Tackle The Relentless on 18 September 2026 at Bridgend Miniature Railway, a rugged 10 mile loop with big climbs and a full lap hub for crew, food and rest. Pick 50 mile or 100 mile and push your limits on this intimate ultra.

Race 47 miles along the Cotswold Way from Chipping Campden to Painswick, traversing the rolling hills of the Cotswolds Area of Outstanding Natural Beauty. This licensed continuous trail challenge runs under UK Athletics and TRA rules.

UTMB Index

Tackle the iconic Cotswold Way Century, a 102 mile single stage trail from Chipping Campden to Bath across rolling hills and varied terrain. You have 32 hours to earn a buckle while enjoying live tracking, aid stations and full GPX support.

UTMB Index

Salmon Run on 19 September 2026 is a scenic community run from Exmouth to Dulverton offering a 43 mile ultra or relay sections for teams. Celebrate river conservation with music, local activities and a medal for all finishers.

Run the stunning Gower Coastal Trail Races on 26 September 2026, with 23, 34 or 50 mile options along dramatic cliffs, beaches and charming fishing villages. Chip timing, checkpoints and post race facilities make this a must do coastal chal..

Take on scenic park trails at Margam Country Park on 27 September 2026 with a choice of 5K or 10K laps suited to runners of all levels. Chip timing, water stations and a finisher medal ensure a rewarding and well supported race day.

Run through ancient woodland in the Forest of Dean at the Autumn Half Marathon starting and finishing at Speech House. This scenic 13 mile trail on well marked tracks supports local charities and awards a medal to every finisher.

October 2026

Run wild Dartmoor in early October with the Dartmoor Way from Okehampton, choose the challenging 100 mile Full Circle or the rugged 51 mile Granite 50. Waymarked and fully supported, routes across moorland promise epic scenery.

UTMB Index

Push your limits on the Salt Settlers Six Hour Race, a scenic 4.4 km loop in the Lower Otter valley from Budleigh Salterton Cricket Club. Run or walk solo or in pairs across six hours and enjoy cafe, showers and a commemorative memento.

Put your navigation skills to the test at East Devon 8 Trigs, a self navigated trail from Budleigh Salterton with 21 km, 42 km and 53 km routes along the South West Coast Path and Woodbury Common. Solo or two person teams, GPS tracking and..

Run a scenic and rugged half marathon through the Quantock Hills, featuring rolling climbs, forest trails and open moorland. Enjoy on course support, a finishers medal and a festival vibe with camping, pizza and nearby pubs.

Run a scenic 32 mile loop in the Cambrian Mountains from Camp Plas on 10 October 2026 with a fully marked, well supported course. Enjoy exclusive weekend camping, BBQ, live music and lakeside activities, entries limited to 100.

Tackle 55 km through the Forest of Dean, from ridges and dense woodland to the River Wye and Symonds Yat viewpoint. Technical single track and riverside sections offer scenic challenge and there is a canicross category.

Take on the scenic Twin Peaks & Ras Consti in Aberystwyth, with a testing 11.7 kilometre senior route over Pen Dinas and Constitution Hill. Starts and finishes on the promenade with great views, cafes and family friendly junior races.

Blaze the Biblins on 18 October 2026 is a scenic 10k trail race through ancient woods and riverbanks near Ross on Wye. Expect technical single track, climbs including the notorious Demon hill, and a lively village finish.

Roughly 12K trail run on bridle paths and the Imber Range near the Westbury White Horse on 18 October 2026. Limited to 200 places so book early for a bespoke finisher medal and category prizes.

Run muddy, multi terrain trails across rolling Stockland countryside with river crossings and hills, choosing 3 km, 5 km or 10 km distances. Village hall hub offers parking, cake and limited on the day entries.

Town and Country Harriers is a friendly Bristol based off road club that meets most Thursdays, usually starting and finishing at a local pub. Trails range from city paths to the Mendips and Cotswolds and all who can run 4 to 5 miles are wel..

Halloween 7in7 at Pengethley Manor, Ross on Wye offers seven consecutive days of off road laps through vineyards and a hill, with distances from 5k to ultra. Walk or run any day or go virtual and collect seven themed medals.