Trail Running calendar near Merthyr Tydfil 2025-2026

We have found 245 Trailruns within 80 miles of Merthyr Tydfil. See below where and when you can find the races.

The Big Cheese is an off road fell race in Cheddar, Somerset, covering 15 miles across the Mendip Hills with over 2,000 ft of climb. Take on a fully marked course and enjoy a finisher's medal plus tea and cake at the end.

Take on the Wild Horse 200 series: two epic 200 mile trail ultramarathons across Welsh trails and mountains. Run the South Wales coast route from Chepstow to Worm's Head in April or the Mid Wales loop from and to Machyntlleth in June.

Take on the inaugural MTC Gelert 47 mile ultra from Barmouth to Llanidloes on 16 April 2026, the third day of the MTC CYMRUN end to end. Limited field, bespoke medal for all finishers and real time tracking for supporters.

Inaugural MTC Afanc ultra on 18 April 2026 sends runners 39.7 miles along National Cycle Route 8 from Glasbury to Merthyr Tydfil. Expect rugged scenery, strict pacing and a hard earned Afanc medal at the finish.

Run or walk the Shropshire Way 80K Festival on 18 April 2026 from the Shropshire Hills Discovery Centre, enjoying hilly trails through peaks, Iron Age hillforts and woodlands. Distances 10 km to 80 km and proceeds support Grow Cook Learn.

Join a guided 18 mile trail run along the Malvern Hills ridge, summiting the peaks and tackling 1300 m of ascent with a qualified coach. Not a race; expect steady trail pace, stunning views and friendly company.

Challenge the Beast of the Beacons on 18 April 2026 at Gilestone Farm, Powys with 10, 20 or 40 mile trail options across ridges, reservoirs and forests. Expect technical, scenic terrain with marshals, camping and on site catering.

Explore the Black Mountains and Blaenavon World Heritage area on scenic 20, 30 or 50 mile walking and running routes from Abergavenny. LDWA South Wales hosts this friendly spring challenge with canal finishes and dramatic hilltop views.

Take on the inaugural MTC Y Draig Goch on 19 April 2026, a scenic 35 mile stage from Merthyr Tydfil to Barry Island along National Cycle Route 8. Limited to 40 entrants, all finishers earn a Y Draig Goch medal and top athletes win bespoke t..

Martley Madness is a scenic 10 miles trail race across Rodge Hill and woodland, with challenging climbs and quiet country lanes. Finishers get bespoke medals and proceeds benefit Cardiac Risk in the Young.

Join a guided 14 km trail run in peaceful Penllyn Forest on 19 April 2026, exploring quiet tracks between Bala and Lake Vyrnwy. Expect a led run with scenic stops and friendly company in person.

Run coastal trails from Little Haven in Pembrokeshire National Park past cliffs, coves and sandy bays on exposed, undulating terrain. Choose 10K to ultra, score Endurancelife points and enjoy chip timing, a finisher medal and on site suppor..

UTMB Index

The Bath Beat showcases scenic running and walking from Bath into Cotswolds countryside, with distances from 12.5 to 26.5 miles. Checkpoints serve homemade cakes, long routes offer hot meals, and finishers get a medal and warm welcome.

Tackle the scenic Butcombe Trail Ultra in the Mendip Hills with 50 mile or 50 km self navigation routes starting at Churchill HQ. Rugged off road trails, pub stops and friendly volunteer support await.

UTMB Index

Discover the Corvedale Cake Walk from Holdgate Church near Much Wenlock, featuring scenic tracks and climbs to Abdon Burf, Shropshire's highest point. Choose 22 mile or 10 mile routes, enjoy refreshments and support church communities.

Choose your distance in this 7 hour time challenge at scenic Dare Valley Country Park, with multi lap routes from 3 km up to 50 km. Enjoy on course snacks, vegan options and themed medals with distance pins.

May 2026

Trail festival in Offwell near Honiton on the first May bank holiday, headlined by a 68 mile round with 38, 31 and 15 mile options across AONBs and the Jurassic Coast. Camping, communal meals and a Sunday mini round create a friendly vibe.

Malvern Hills Ultra offers 23, 31, 38 and 47 mile scenic but tough out and back routes along the Worcestershire Way. Self navigation with GPX support and helpful Timelords pacers, plus a bespoke finisher medal and commemorative swag.

Run the Brecon Beacons with Rasus y Bannau, choosing marathon, 75 km or 100 km routes over iconic ridges and reservoirs. Rugged mountain terrain, full safety support and spectacular views await.

UTMB Index

Take on the HOWUM 2026 30 mile trail ultra around Llanidloes, following scenic paths past reservoirs, the Severn source and historic waymarked trails. With no time limit and three supported checkpoints this is a wild friendly challenge.