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Running Calendar near Merthyr Mawr 2026-2027

Monthly updates for Merthyr Mawr

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

Explore the top running races near Merthyr Mawr for 2026-2027! We've gathered 107 exciting races in the area. Check out our detailed list below to find your next local race.

Half Marathons Marathons Trail Runs Triathlons
January 2026
Jan
17
Sa

Dark Skies Series

Trail Run 5 km 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 ... 50 km 7 hr
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

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
Mar
1
Su

St David's Day Run

5 km 10 km Half Marathon
Mar
1
Su

City Of Newport Half Marathon

Half Marathon
Mar
1
Su

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... 50 km 7 hr
Mar
1
Su

Phoenix Running - Cardiff Bay

3 mi
Mar
7
Sa

The Hateful 8 Loopy Ultra

Backyard Ultra 9 mi
Mar
14
Sa

Starlight Challenge: Arlington 'Owler

Trail Run 6 km 12 km
Mar
15
Su

Saturn 7 Hour Time Challenge - Aberdare

3 km 7 km 50 km