Trethomas
Trail Running Calendar near Trethomas 2026-2027
Explore the top trail runs near Trethomas for 2026-2027! We've gathered 113 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
May 2027
Trail races at Margam Country Park on 23 May 2027 with 5 km, 10 km and half marathon courses, chip timing, finishers' kit and canicross options.
A multi-stage event at Dare Valley Country Park where runners complete five Pure distances within 24 hours, with separate and combined results. Distances include 5k, 10k, 50k, half marathon and marathon.
Altered Backyard Ultra at Tockington Manor on 29 May 2027, running hourly 4.126 mile loops up to a 30-loop cap for about 201 km, field capped at 250 runners.
June 2027
A roughly 6 kilometre mixed-surface race through Blaise Castle Estate in Bristol, held annually in early June. The event has individual and team prizes, a minimum age of 16, and facilities based around the clubhouse.
Military themed D Day series run at Parc Taf Bargoed with 5.3 km laps; choose distances up to ultra within a seven hour time limit and earn commemorative medals.
An off-road race series around Cheddar Gorge and the Mendip Hills with distances from 1 km to marathon and an Omnium option; half and marathon hold UTMB index status.
A Pretty Muddy 5k at The Downs in Bristol with grass start and finish, mixed terrain and obstacles to climb, crawl and slide. Staggered wave starts apply and the event supports Cancer Research UK with a minimum fundraising target.
Inflatable 5K Cardiff on 26 June 2027 offers lap-based inflatable obstacle runs from 2.5k to 15k with music zones, medals and family and group ticket options.
July 2027
A 10 hour loop endurance challenge on Mynydd Troed with roughly 2.7 mile marked laps, about 1,000 ft ascent per lap, solo, pairs and four‑person team entries.
Trail races on the private Merthyr Mawr Estate with a 12K, half marathon and marathon across dunes, river crossings and the Glamorgan Heritage Coast.
Flat races along former railway and riverside paths through the Wye Valley, featuring long tunnel sections, multiple feed stations and a choice of fun runs, 10km, half and marathon.
A 100 miles mountain ultramarathon across the Brecon Beacons on 24 July 2027 with 6143 m ascent, ten checkpoints, mandatory navigation skills and live GPS tracking.
An urban navigation challenge in Cardiff where participants are blindfolded, dropped at an undisclosed location and must return across 6, 10 or 15 miles without maps or GPS.
Trail ultra in the Brecon Beacons on 24 to 25 July 2027 offering distances from 10 km to 100 miles with charity and U23 entry options.
A self-navigated 100 km across the Brecon Beacons with 3178 m ascent, six staffed checkpoints, strict qualifying criteria and a 24-hour cut-off.