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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!

September 2026
Sep
27
Su

RTT Margam 10k

Trail Run 5 km 10 km
October 2026
Oct
3
Sa

Town to Tower 10K

Trail Run 10 km
Oct
10
Sa

The Loop Ultra - Dolanog

Trail Run 50 km 32 mi
Oct
11
Su

Rad Dau Gopa Aberystwyth Twin Peaks Race

Trail Run 3 km 12 km
Oct
17
Sa

Loggerheads Autumn Trails

Trail Run 6 km 12 km
Oct
18
Su

Brenig Way 50K Trail Race

Trail Run 50 km
Oct-Nov
30-1
Fr - Su

Black Beacon Mountain Races

Trail Run 21 mi 50 km 50 mi 100 mi
November 2026
Nov
1
Su

Anglesey Trail Half Marathon

Trail Run 10 km Half Marathon
Nov
7
Sa

Endurancelife | Gower

Trail Run 7 mi 14 mi 27 mi 34 mi
Nov
7
Sa

Beacons Ultra

Trail Run 13 mi 26 mi 49 mi
Nov
14-15
Sa - Su

Slate Trail Ultra

Trail Run 80 km 147 km
Nov
14
Sa

Margam Trail Races

Trail Run 5 km 10 km Half Marathon
December 2026
Dec
11
Fr

Trail by Torchlight

Trail Run 8 km
Dec
12
Sa

Celtic Trail Races

Trail Run 13 mi 26 mi 34 mi
Dec
19
Sa

Nightmare before Xmas Trail ½ Marathon

Trail Run Half Marathon
Dec
20
Su

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... Marathon 50 km