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.
August 2026
A fell race near Machen covering 7 km with 365 m ascent, held with on the day entry and registration at Machen Welfare Ground.
September 2026
A navigational endurance march in South Wales offering a full 64 km route and a 32 km half with self navigation and guided group options.
A new 15 mile trail event in September 2026 on the Rhymney Valley Ridgeway Walk, with 2,267 ft of ascent, mostly off-road terrain, one fully stocked checkpoint and organised entry support from Rudry to Parc Penalta.
Timed lap event at Parc Taf Bargoed on 12 September 2026 offering distances from 5 km up to ultra with a 7 hour time limit.
A long, non-commercial fell race in the Black Mountains with a 27.4 km route and 1586 m of ascent. The event uses five checkpoints, requires full navigational kit, and operates on open access land with no on-course water provided.
A 12km canitrail and trail run at Halo Ogmore Valley Life Centre in aid of PAPYRUS on 13 September 2026, entry £26, dogs welcome.
A 12 hour Backyard Ultra on a 4.2 mile loop near Crickhowell in the Black Mountains. The final lap is run in reverse as a sprint to decide male and female winners; medals are awarded for 32 miles or more.
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.
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
Test your endurance on a 9 mile mixed terrain loop with an 8 hour time limit to complete as many laps as possible in Bridgend.
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 in the Quantock Hills with a 21.2 km route and 839 m ascent, limited to 300 runners and featuring chip timing, waymarked route and on course feed stations.
Trail running and ruck options at Ashton Court Estate with 6k, 10k and half marathon distances and supplied GORUCK backpacks.