Cardiff
Trail Running Calendar near Cardiff 2026-2027
Explore the top trail runs near Cardiff for 2026-2027! We've gathered 99 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
September 2026
A five mile mixed-terrain race through Porthkerry Country Park with varied surfaces, two climbs and inclusion in the South Wales Regional Trail Championship.
A fell running race in Caerphilly on 26 September 2026 featuring a 9.5 km course with 336 m of climb, partially marked and with a short walk from parking to the start.
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
A mixed terrain 9 mile loop in Bridgend where runners complete as many laps as possible within an 8 hour time 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.
Trail half marathon in the Quantock Hills on 4th October 2026, 21.2 km with 839 m ascent, waymarked route, chip timing, feed stations and wooden finisher medals.
Trail and ruck event at Ashton Court Estate on Oct 4, 2026 offering 6k, 10k and half marathon distances with Pro and Open categories and GORUCK backpacks provided.
Somerset not Levels is a 50 mile LDWA qualifier in Crowcombe with two loops through the Brendon Hills and the Quantocks on 10 to 11 October 2026.
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 trail race from Keynsham through rivers, woods and fields with two stream crossings, canicross places, medals for finishers and limited entries.
Backyard Ultra in Bristol asks runners to complete a four mile loop each hour for six hours, with a beer, finisher goody bundle, water station and prizes for top male and female.
A 20 km multi terrain fell race on 25 October 2026 across varied Mendip landscapes with 420 m of climb, drinks stations en route and veteran prize categories.
A 9.6 km fell race with 485 m ascent near Abergavenny on 31 October 2026; full WFRA kit is required and parking at the pub is very limited.
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 from Risca Leisure Centre to Twmbarlwm and back, with about 1000 ft ascent; entries listed via Entry Central.