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Trail Running Calendar near Ystradgynlais 2026-2027

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Explore the top trail runs near Ystradgynlais for 2026-2027! We've gathered 96 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.

August 2027
Community-run trail races around Afan Argoed offering 10.5 mile, 6.5 mile and a 1 mile U18 event with chip timing, marshals, water stations and mountain rescue cover.
September 2027
SBOC Autumn Sprint Series #1 at Tircoed near Swansea on 1 Sep 2027 is a local club event with coaching available and facilities noted as suitable for families and newcomers.
SBOC Autumn Sprint Series #2 in Brecon on 8 September 2027 is a local orienteering event with family and newcomer friendly options and coaching available; dogs not allowed.
An annual non-commercial 27.4 km fell race in the Black Mountains with five checkpoints, full kit required and online entry via Fabian4.
SBOC Autumn Sprint Series #3 is a local event at Baglan Moors near Swansea on Wed 15 Sep 2027 with coaching available and no dogs allowed.
A 12 hour Backyard Ultra on a 4.2 mile mixed trail and tarmac loop near Crickhowell, with a reverse-direction final lap to decide male and female winners.
Club league orienteering at Clyne Valley near Swansea on 18 September 2027, organised by SBOC with coaching available and no dogs permitted.
A scenic, hilly trail half marathon in the Cothi valley with an alternative 6.5 mile route and children's races at Pumsaint Village Hall on 19 September 2027.
A local orienteering sprint at Mumbles near Swansea on Wed 22 Sep 2027, organised by SBOC and suitable for families, children and newcomers; dogs not allowed.
Three coastal trail races on the Gower Peninsula on 25th September 2027, including a 50-mile circuit plus 34-mile and 26-mile routes with checkpoints and GPS tracking.
October 2027
SAS Endurance in Talybont-on-Usk on 1-2 October 2027 offers full 64 km and half 32 km navigational routes with guided and self navigation options.
A memorial half marathon and 12k near the Neuadd Arms on 24 October 2027, mainly off-road in mountainous terrain with a cupless water policy.
November 2027
A 30 mile trail ultra through the Brecon Beacons from Merthyr Tydfil, with technical terrain, four checkpoints and a six hour cut-off at checkpoint three.
July 2028
A single day ultra of about 39.7 miles along National Cycle Route 8 from Glasbury to Merthyr Tydfil. Limited field, mandatory kit and 4.0 mph cut offs; finishers receive an Afanc medal and champions receive bespoke trophies.
A point to point 34.8 mile ultra from Merthyr Tydfil to Barry Island following National Cycle Route 8. It is day six of the MTC CYMRUN series and uses preset cut offs based on a 4 mph minimum average speed.
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