Cardiff Bay
Trail Running Calendar near Cardiff Bay 2026-2027
Explore the top trail runs near Cardiff Bay for 2026-2027! We've gathered 103 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
April 2027
Trail ultramarathons in the Mendip Hills offering two self navigation distances, 50 miles and 50 km, organised by Town and Country Harriers to benefit the Mendips Hills Fund. Aid stations, GPS trackers, finish medals, prizes and camping are provided.
A 10km multi-terrain run from Selworthy Beacon to Minehead Beach across Exmoor’s coastline, featuring technical trails, woodland paths and a sandy finish.
A last-person-standing Backyard Ultra at the Medieval Village, Cosmeston Lakes: runners repeat a fixed 6706 m loop each hour until one athlete completes one more loop than anyone else. Camping and on-site facilities are provided.
Timed multi distance event on a 5.3 km Cardiff Bay lap with options from 5 km to ultra, a seven hour limit and flexible start times.
May 2027
A 5k obstacle course at Coopers Field, Bute Park, Cardiff, with tarmac paths and grassy sections that can get boggy after rain. The event raises funds for Cancer Research UK and uses staggered wave starts; participants must be 13 or older.
A hilly, technical Backyard Ultra at Blaise Castle Estate, Bristol, using hourly 4.167 mile laps; the 2027 event is sold out and the waiting list is closed.
A Welsh trail event with 100 mile and 100 km routes along Offa's Dyke Cambrian Way and Beacons Way, supported by aid stations and volunteer crews.
A 50-mile trail ultra near Minehead on 8 May 2027 with about 7,337 ft of ascent, six aid stations and varied coastal, woodland and moorland terrain.
A trail marathon around Cardiff with about 1,300 m of climbing, mixed off-road terrain, partial self-navigation, checkpoints and support during the Radyr and Morganstown Festival.
Mountain marathon and 10 mile trail race across the Pen y Fan range at Parkwood Outdoors, Merthyr Tydfil, with marked checkpoints and variable mountain terrain.
Gwyn Matthews Rhondda Rollercoaster offers 26.5 and 16 mile routes across the Rhondda Valleys with checkpoints, refreshments, and a completion certificate.
An inflatable obstacle run at North Somerset Showground with 2.5 km laps, multiple distances, music zones, on-course water and a finisher's medal for every participant.
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.