Trail Running Calendar Wales 2025-2026

Oct

19

Sunday

Brenig Way 50K Trail Race

Corwen, Wales

Trail Run 50 km

Oct

26

Sunday

Giddy Horse Half Marathon, Trail, & Steeplechase Obstacle Course Races

Chepstow, Wales

Trail Run Obstacle Run 4 mi 8 mi 13 mi

Oct - Nov

31-2

Fr - Su

Black Beacon Mountain Trail Races

Hirwaun, Wales

Trail Run 21 mi 50 km 50 mi 100 mi

Nov

1

Saturday

OTT Ultra Marathon

Merthyr Tydfil, Wales

Trail Run 30 mi

Nov

8

Saturday

Endurancelife | Gower

Oxwich, Wales

Trail Run 10 km 21 km 42 km 55 km

Nov

8

Saturday

Beacons Ultra

Talybont-on-Usk, Wales

Trail Run 13 mi 26 mi 49 mi

Nov

9

Sunday

Anglesey Trail Half Marathon

Llanfairpwllgwyngyll, Wales

Trail Run 10 km 13 mi

Nov

15-16

Sa - Su

Slate Trail Ultra

Bangor, Wales

Trail Run 88 km 145 km

Nov

15

Saturday

Margam Trail Races

Port Talbot, Wales

Trail Run 5 km 10 km 21 km

Nov

16

Sunday

Cardiff Trail Half Marathon

Tongwynlais, Wales

Trail Run 13 mi

Nov

16

Sunday

Guided Trail Run - Dolwyddelan

Dolwyddelan, Wales

Trail Run 10 km

Dec

6

Saturday

Secret Santa Tinsel Half Marathon

Black Mountains, Wales, Wales

Trail Run 12 km 10 mi 13 mi

Dec

7

Sunday

Sea 2 Summit - Offa's Dyke Half/Full/Ultra

Prestatyn, Wales

Trail Run 13 mi 26 mi 33 mi

Dec

13

Saturday

Winter Celtic Trail Races

Aberdare, Wales

Trail Run 13 mi 26 mi 34 mi

Dec

20

Saturday

Nightmare before Xmas Trail ½ Marathon

Aberkenfig, Wales

Trail Run 26 mi

Dec

20

Saturday

Moel Famau Festive 'Piece of String' Race

Bwlch Penbarras, Wales

Trail Run 12 km

Jan

18

Sunday

Cardiff Trail 10k

Cardiff, Wales

Trail Run 10 km

Mar

7

Saturday

Loggerheads Trail

Mold, Wales

Trail Run 10 km

Mar

14

Saturday

Nant yr Arian Silver Trail

Ystumtuen, Wales

Trail Run 2 mi 10 km 21 km

Apr

16

Thursday

MTC Gelert

Powys, Wales

Trail Run 47 mi