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Trail Running Calendar near Machen 2026-2027

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Explore the top trail runs near Machen for 2026-2027! We've gathered 123 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.

April 2027
A 7 hour Time Challenge at Dare Valley Country Park with distances from 3 km to ultra, medals, goody bags, aid stations and free parking.
May 2027
A 5 km obstacle event at Coopers Field Bute Park Cardiff with mixed tarmac and grass underfoot, staggered wave starts, on course marshals and fundraising support.
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.
Race for Life at Coopers Field, Bute Park offers 10k, 5k and 3k routes on mixed grass and tarmac while raising funds for Cancer Research UK.
Two Welsh trail ultras based in Abergavenny, offering 100 mile and 100 km routes on Offa’s Dyke, the Cambrian Way and the Beacons Way with on-course support.
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.
Two route options, 26.5 miles and 16 miles, start from Trehafod Community Village Hall across the Rhondda Valleys with checkpoints, refreshments and a hot meal at the end.
A 10k trail run at Symonds Yat with riverside views and a notable final one kilometre climb. The mostly off road course includes long gravel firetracks and on site coffee and hot food.
Women only 10 km trail event at Margam Country Park on 16 May 2027 with chip timing, finisher medal, medical support and free parking.
An inflatable obstacle fun run at North Somerset Showground on 22 May 2027 offering lap based distances from 2.5 km to 15 km with giant slides, tunnels and music zones.
SBOC Summer League 4 and Saturday Park O at Craig y Nos Country Park on 22 May 2027 offers club league orienteering near Swansea with family friendly and newcomer options.
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.
Altered Backyard Ultra at Tockington Manor on 29 May 2027 with a 4.167 mile loop each hour, capped at 30 loops and a fastest lap finish if runners remain.
Team relay on a flat 2.5km lap at Clifton Downs, Bristol, with four-hour racing, pairs or teams of four, charity entry options, and a £2700 prize fund.
June 2027
Three urban orienteering races across Bristol and Bath, 4–6 June 2027, with single entry options and weekend SI card hire.
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.
Two ultramarathon options from Chepstow through Offa’s Dyke, the Malvern Hills and the Forest of Dean with about 10,000 ft of climb.
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.
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