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Trail Running Calendar near Cardiff 2025-2026

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Explore the top trail runs near Cardiff for 2025-2026! We've gathered 47 exciting races in the area. Check out our detailed list below to find your next local race.

August 2025
Aug
16
Saturday

One Fyne Night

Trail Run 5 km 10 km
Aug
17
Sunday

Beast Of Bryn

Trail Run 6 mi 10 mi
Aug
23
Saturday

The Summer GMU

Trail Run 30 mi 45 mi
Aug
23
Saturday

Black Cattle Ultra Gwartheg Duon

Trail Run 53 km 71 km
Aug
23
Saturday

Crickhowell 10km

Trail Run 10 km
September 2025
Sep
6
Saturday

The Ridum

Trail Run 30 mi
Sep
7
Sunday

Blackdown Hills Half Marathon

Trail Run 10 km 13 mi
Sep
20
Saturday

The Maverick X Series Afan Forest

Trail Run 10 km 25 km 42 km 50 km
Sep
27
Saturday

The Maverick Original Mendips

Trail Run 7 km 13 km 22 km
Sep
28
Sunday

Black Nore 10km

Trail Run 10 km
October 2025
Oct
5
Sunday

Quantock Hills Half Marathon

Trail Run 13 mi
Oct
19
Sunday

Keynsham Dandy

Trail Run 12 mi
Oct
26
Sunday

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

Trail Run Obstacle Run 4 mi 8 mi 13 mi
Oct - Nov
31-2
Fr - Su

Black Beacon Mountain Trail Races

Trail Run 21 mi 50 km 50 mi 100 mi
November 2025
Nov
1
Saturday

OTT Ultra Marathon

Trail Run 30 mi
Nov
8
Saturday

Beacons Ultra

Trail Run 13 mi 26 mi 49 mi
Nov
9
Sunday

Bristol Morun

Trail Run 5 km 10 km
Nov
15
Saturday

Margam Trail Races

Trail Run 5 km 10 km 21 km
Nov
16
Sunday

Cardiff Trail Half Marathon

Trail Run 13 mi
December 2025
Dec
13
Saturday

Celtic Trail Races

Trail Run 13 mi 26 mi 34 mi
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