Wales
Trail Running Calendar Wales 2026-2027
Explore the best trail runs in Wales for 2026-2027! Our updated list features 180 exciting trail runs across the region. Find your next trail run in Wales below and join the trail community at these great events!
October 2026
A guided 13 km loop around Llyn Trawsfynydd in Southern Snowdonia on runnable trails with limited ascent and regular regrouping stops.
Mountain trail races across the Brecon Beacons and Black Mountains offering distances from 21 miles to 100 miles with GPS navigation and staffed checkpoints.
A 32 km, 1800 m mountain challenge on Pen y Fan with three climbs via six different routes, offered as an unweighted race or a 16 kg weighted category.
A 9.6 km fell race with 485 m ascent near Abergavenny on 31 October 2026; full WFRA kit is required and parking at the pub is very limited.
Timed lap event at Barry Sidings Country Park with flexible start times, distances from 5 km to ultra on a tarmac out and back course and a medal or no medal option.
November 2026
Trail races in Newborough Forest and Llanddwyn Island offering 10 km and half marathon with an event village, chip timing and on course support.
Trail races around Moel Famau on 1 November 2026 with 17 km and 10 km options, mandatory waterproof and navigation kit, and reduced single use plastic.
Approximately 7 mile multi-terrain race from Risca Leisure Centre to Twmbarlwm and back, with about 1000 ft ascent; entries listed via Entry Central.
An evening trail run in Llandegla Forest on 6 November 2026 covering 6.4 km with 229 m climb; partially marked course, compulsory headtorch and kit, £5 entry on the day.
Trail races at Oxwich Bay on 7 Nov 2026 with 10K, half, marathon and ultra routes across coastal terrain; online check in and season leaderboard points apply.
Mixed trail, mountain, canal and road runs around the Brecon Beacons on 7 November 2026, offered at 50 miles, 26 miles and 13 miles.
A medium length fell race from Llanfachreth with a 6 mile route and 579 m ascent, forming the first event in the Meirionnydd Winter Race Series.
A 30 mile trail ultra in the Brecon Beacons on technical paths, with four checkpoints, compulsory kit requirements, and a six hour cut-off at the third checkpoint.
A mountain fell race around Cilcain of 14.2 km with 910 m ascent, Category A with mandatory kit, limited Waterworks parking, and a staffed kit dump.
Multi terrain races at Margam Country Park on 8 Nov 2026 featuring individual and CaniX 5K, 10K and 20K events plus a 12 x 5K Countdown Ultra.
Cross country meeting at Llandaff Fields in Cardiff on 8 November 2026, with age-group, school and senior races and World Athletics Silver Label status.
APEX Running's 2026 Slate Trail Ultra offers two off-road ultra distances across the Snowdonia Slate Trail, combining mountain terrain, village checkpoints and slate industry heritage.
Fully marked trail races at Margam Park including a half marathon and a 10k, running through woodland, parkland and the deer park with coastal views; entries include parking, timing, a medal and download photos.
Trail Half Marathon Wales at Margam Country Park on 14 November 2026 features fully marked forest races over 21.1 km and 10.2 km with checkpoints and included parking.