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Running Calendar near Merthyr Tydfil 2025-2026

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Explore the top running races near Merthyr Tydfil for 2025-2026! We've gathered 73 exciting races in the area. Check out our detailed list below to find your next local race.

September 2025
Sep
20
Saturday

The Maverick X Series Afan Forest

Trail Run 10 km 25 km 42 km 50 km
October 2025
Oct
4
Saturday

The Hateful 8 Ultra Loop the Winter Series

9 mi
Oct
4
Saturday

Gower Ultra 50, Ultra Bach & Trail Race

Trail Run 23 mi 50 km 34 mi
Oct
5
Sunday

Cardiff Half Marathon

13 mi
Oct
18
Saturday

Afan Forest Trail Half Marathon

10 km 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
2
Sunday

Richard Burton 10k

10 km
Nov
8
Saturday

Beacons Ultra

Trail Run 13 mi 26 mi 49 mi
Nov
15
Saturday

Margam Trail Races

Trail Run 5 km 10 km 21 km
Nov
15
Saturday

Dusk Till Dawn The Winter Edition

Backyard Ultra 10 mi
Nov
15
Saturday

Trails & Tarmac Backyard Ultra

Backyard Ultra 4 mi
Nov
16
Sunday

Cardiff Trail Half Marathon

Trail Run 13 mi
December 2025
Dec
6
Saturday

Secret Santa Tinsel Half Marathon

Trail Run 14 km 10 mi 13 mi
Dec
6
Saturday

Secret Santa Series

Trail Run 14 km 10 mi 13 mi
Dec
13
Saturday

Celtic Trail Races

Trail Run 13 mi 26 mi 34 mi
Dec
20
Saturday

Nightmare before Xmas Trail ½ Marathon

Trail Run 13 mi
Dec
21
Sunday

Saturn Running - Aberdare

Backyard Ultra 5 km 4 mi ... 26 mi 50 km
January 2026
Jan
18
Sunday

Cardiff Trail 10k

Trail Run 10 km
Jan
24
Saturday

Saturn Running - Aberdare

Backyard Ultra 5 km 7 km 50 km
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