Cardiff
Trail Running Calendar near Cardiff 2026-2027
Explore the top trail runs near Cardiff for 2026-2027! We've gathered 104 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
September 2026
A 23 mile trail race across the Quantock Hills pitting runners against horses, with a Pegasus Challenge four person relay in Over Stowey on 19 September 2026.
The Porthkerry 5MT is a five mile mixed terrain race in Porthkerry Country Park, offering coastal views and diverse surfaces. The 2026 edition marks the race's 20th anniversary and includes the South Wales Regional Trail Championship.
Guto Nyth Bran is a fell race on 26 September 2026 at Bedwas Community Hall covering 9.6 km with 396 m of climb. The course is partially marked, includes a short walk from parking, and is for entrants over 18.
Trail race at Margam Country Park offering 5 km and 10 km routes through woodland with castle views. The event features chip timing, water stations, a finisher's medal and parking included with entry.
A coastal 10 km race along the North Somerset shoreline, passing Black Nore Lighthouse and Redcliffe Bay. The mixed terrain route includes grass, mud, rocks and tarmac with undulating sections and a seafront finish.
October 2026
Repeat a 9 mile mixed-terrain loop at The Nature Centre, completing as many laps as possible within an eight hour limit.
A 7 hour Time Challenge at Dare Valley Country Park with flexible distances from 3 km to ultramarathon options. Finishers receive a themed medal, distance pins and refreshments including doughnuts and ice cream.
A trail half marathon through the Quantock Hills with technical trails, climbs, stiles and stream crossings. The route has marshals, two feed stations and clear signage, with awards for top finishers and weekend camping and bunkhouse options.
Trail event at Ashton Court Estate offering 6 km and 10 km trail or ruck options with GORUCK Rucker 4.0 and competitive or open categories.
A 50 mile LDWA qualifier in Crowcombe on 10 to 11 October 2026, run as two loops onto the Brendon Hills and the Quantocks; entries require a recent 30 mile completion.
A seven hour Time Challenge at Dare Valley Country Park offering distances from 3km to 50km, themed finisher medals and distance pins, on course aid with vegan options, and basic venue facilities including toilets and free parking.
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.
A 12.5 miles autumn trail race from Keynsham with two stream crossings, water stations, canicross places and a finisher medal for every runner.
Run a 4 mile loop every hour for 12 hours at Left Handed Giant in Bristol, aiming for up to 48 miles with on-site hydration and a finisher goody bundle.
Mendip Muddle is a 20 km multi terrain fell race in Somerset with about 420 m of climbing. Headquarters are at Charter House Outdoor Activity Centre; on course water and first aid are provided and prizes are awarded by category.
Winter fell race up Sugar Loaf covering 9.6 km with 485 m ascent from The Crown, Pantygelli; full WFRA kit required and entry via Fabian4 with limited parking.
Timed lap event at Barry Sidings Country Park with flexible start times, distances from 5 km to ultra on a tarmac out and back course and a medal or no medal option.
November 2026
Approximately 7 mile multi terrain race to Twmbarlwm with about 1000 ft elevation, organised by Fairwater Runners Cwmbran at Risca Leisure Centre on 01 Nov 2026.
Three trail races around Talybont On Usk on 7 November 2026, from a 13 mile half to an approximately 49 mile ultra that includes an out and back to Pen y Fan.