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Running Calendar near Merthyr Tydfil 2025-2026

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Monthly updates for Merthyr Tydfil

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Explore the top running races near Merthyr Tydfil for 2025-2026! We've gathered 113 exciting races in the area. Check out our detailed list below to find your next local race.

Half Marathons Marathons Trail Runs Triathlons
December 2025
Dec
26
Fr

Festive 5 Boxing Day Race

5 km
Dec
26
Fr

Porthcawl Boxing Day Run

6 km
Dec
28
Su

Phoenix Running - Trehafod

5 km 10 km Half Marathon Marathon
Dec
31
We

New Years Eve Ready Races

10 km 10 mi
January 2026
Jan
1
Th

The Prince of Wales New Year's Day Race

6 km
Jan
18
Su

Cardiff Trail 10k

Trail Run 10 km
Jan
18
Su

CF64 Winter Race

Trail Run 10 km
Jan
18
Su

West Glamorgan XC League - Margam Park

Trail Run 5 mi
Jan
24
Sa

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... Marathon 50 km
Jan
24
Sa

Saturn Running - Aberdare

Backyard Ultra 3 km 5 km ... Marathon 50 km
Jan
25
Su

Resolution Run 5k

5 km
Jan
25
Su

Phoenix Running - Trelewis

Backyard Ultra 5 km 10 km Half Marathon Marathon
February 2026
Feb
1
Su

The Cardiff Half Marathon Winter Warmer Run

5 km 10 km Half Marathon
Feb
1
Su

West Glamorgan XC League - Kenfig Nature Reserve

Trail Run 4 mi
Feb
14
Sa

Trails & Tarmac Backyard Ultra

Backyard Ultra 4 mi
Feb
14
Sa

Phoenix Running - Trelewis

Backyard Ultra 5 km 10 km Half Marathon Marathon
Feb
15
Su

Pontypool 10K Home Run

10 km
Feb
22
Su

Sorbrook Slog

Trail Run 7 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