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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.

January 2027
A 9.6 mile off road January race on trails, fields and riverbank with one water station at 5.8 miles and metal medals plus buffs for 2027 finishers.
A Category AS fell race on 17 January 2027 in Monmouth, covering 6.3 km with 350 m climb on mixed rough and road terrain, part of the South Wales Winter Hill Series.
A roughly 6.4 mile mixed terrain off road race within Cosmeston Lakes Country Park, organised by Penarth and Dinas Runners and licensed by Welsh Athletics.
M10 Cardiff at Coopers Field, Bute Park offers 10 Mile and 5 Mile races as part of the 2027 M10 Race Series with chip timing and Welsh Athletics affiliation.
Lap-based timed event on 23 January 2027 at Parc Taf Bargoed offering distances from 5 km to ultra with a 7-hour time limit and flexible rock-up starts.
Half Marathon, 10K and 5K at Chepstow Racecourse on 24 January 2027 with chip timing, free photos, event village and a themed medal.
A 7 hour time challenge at Dare Valley Country Park offering distances from 3 km to 50 km, medals, goody bags, aid stations and free parking.
A 9 km fell race with 550 m of ascent around Cwm Nant y Groes featuring checkpoints, a flagged anticlockwise loop and enforced full kit.
Winter ultra in the Brecon Beacons on 30 January 2027 offering 75 mile and 100 mile routes starting from Penderyn Square in Merthyr Tydfil.
Trail races at Oldbury Court Estate near Bristol offering 4 Mile, 10km and half marathon routes through woodland and riverside paths with live chip timing and finisher medals.
February 2027
A Backyard Ultra near Crickhowell on 6 February 2027 featuring repeated 4.2 mile loops, a reversed final race lap, trophies for final lap winners and medals from 32 miles.
Timed multi-lap run in Parc Taf Bargoed with 5.3 km laps and distances from 5 km to ultra, offering bespoke medals or a lower cost no medal entry.
Mountain ultra and marathon from Brecon to Cardiff, featuring a 47.5 mile 2,800 m ascent ultra and a 26.2 mile 1,200 m marathon option.
A one way, fully marked 70k ultramarathon along the Taff Trail from Brecon to Nantgarw. The route moves from mountain landscapes to former industrial valleys and includes coach transfer to the start, checkpoints and live GPS tracking.
Valentines themed 6 km and 12 km runs at Blaise Castle Estate in Bristol on February 14, 2027, with single and couples entries and heart finishers' medals.
Trail running 5k and 10k near Cardiff on marked multi terrain routes with medical support, marshals, finisher medals and category trophies.
A chip timed 5 km, 10 km and half marathon at Ashton Court, Bristol supporting Shelter on a mixed trail and path course with lap based routes.
An approximately 8-mile multi terrain race around Sorbrook and Sluvad near Cwmbran with marshalled routes, medical cover, goody bags and age-category prizes.
Family-friendly St David's Day run at Dare Valley Country Park offering 2.5 km or 5 km routes, themed medals and a Santa gift, with toilets and free parking.
A 7 hour time-challenge at Dare Valley Country Park offering looped distances from 3 km up to ultra, with medals, distance pins, goody bags and on-course aid.
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