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Trail Running Calendar Wales 2025-2026

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Monthly updates for Wales

Get new running races (and updates) in your inbox every month.

Explore the best trail runs in Wales for 2025-2026! Our updated list features 116 exciting races across the region. Find your next race in Wales below and join the running community at these great events!

January 2026
Jan
10
Sa

Reservoir Roundabout

Trail Run 12 mi 20 mi
Jan
18
Su

Cardiff Trail 10k

Trail Run 10 km
Jan
18
Su

Guided Trail Run - Eyarth Rocks and Graig Wyllt

Trail Run 12 km
Jan
18
Su

CF64 Winter Race

Trail Run 6 mi
Jan
18
Su

West Glamorgan XC League - Margam Park

Trail Run 5 mi
Jan
24
Sa

Tour De Yr Wyddfa

Trail Run 22 km 44 km
Jan
24
Sa

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... Marathon 50 km
Jan
31
Sa

Tarrenhendre Fell Race

Trail Run 6 mi
February 2026
Feb
1
Su

West Glamorgan XC League - Kenfig Nature Reserve

Trail Run 4 mi
Feb
22
Su

Sorbrook Slog

Trail Run 7 mi
Feb
28
Sa

Castle2Castle #Ultra

Trail Run 32 mi
March 2026
Mar
1
Su

Brecon to Cardiff Classic

Trail Run 70 km
Mar
1
Su

Brecon to Cardiff Xtreme

Trail Run Marathon 75 km
Mar
1
Su

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... Marathon 50 km
Mar
1
Su

Brecon to Cardiff Ultra

Trail Run 43 mi
Mar
7
Sa

Loggerheads Trail

Trail Run 5 km 10 km
Mar
7
Sa

Pipe Dream Dolgarrog

Trail Run 4 mi 7 km
Mar
14
Sa

Nant yr Arian Silver Trail

Trail Run 2 mi 3 mi 10 km Half Marathon
Mar
14-15
Sa - Su

Brynkinalt Running Festival

Trail Run 5 km 10 km
Mar
14
Sa

Beast Of The Blacks

Trail Run 10 mi 20 mi 40 mi