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.
June 2027
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.
An untimed inflatable obstacle course in Cardiff on 26 June 2027 offering 2.5k to 15k lap distances, inflatables, music zones, hydration and a finisher medal.
July 2027
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 ultramarathon across the Brecon Beacons near Abergavenny on 24 to 25 July 2027 offering distances from 12km to 100 miles and UTMB index status.
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.
Coastal ultramarathons along the Wales Coast Path with 100-mile, 50-mile and 50 km options, marked routes, GPS support and staffed checkpoints.
August 2027
Trail runs at Fyne Court Estate with 5 km and 10 km options, optional wooden finisher medals and a focus on reducing event waste.
A 35-mile trail ultramarathon on 29 August 2027 from Chepstow Castle along the Wye Valley Trail and Offas Dyke, returning through the Tiddenham Tunnel with live music at the finish.
September 2027
An annual non-commercial 27.4 km fell race in the Black Mountains with five checkpoints, full kit required and online entry via Fabian4.
A 12 hour Backyard Ultra on a 4.2 mile mixed trail and tarmac loop near Crickhowell, with a reverse-direction final lap to decide male and female winners.