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Half Marathon Calendar near Merthyr Tydfil 2026-2027

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Monthly updates for Merthyr Tydfil

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Explore the top half marathons near Merthyr Tydfil for 2026-2027! We've gathered 33 exciting races in the area. Check out our detailed list below to find your next local race.

March 2026
Mar
15
Su

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... Marathon 50 km
Mar
22
Su

Merthyr Half Marathon

Half Marathon
Mar
29
Su

Phoenix Running - Trelewis

Backyard Ultra 5 km 10 km Half Marathon Marathon
April 2026
Apr
19
Su

Newport Wales Marathon

10 km 13 mi 26 mi
Apr
25
Sa

Phoenix Running - Trelewis

Backyard Ultra 5 km 10 km Half Marathon Marathon
Apr
26
Su

Saturn 7 Hour Time Challenge - Aberdare

3 km 7 km ... Marathon 50 km
Apr
26
Su

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... Marathon 50 km
Apr
26
Su

St David's Day Run

5 km 10 km Half Marathon Marathon
May 2026
May
30
Sa

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... 26 mi 50 km
May
30
Sa

Phoenix Running - Trelewis

Backyard Ultra 5 km 10 km ... Marathon 7 hr
June 2026
Jun
6
Sa

Midnight Mountain Marathon

Trail Run 13 mi 26 mi
Jun
6
Sa

Conquer Cardiff Summer 5k 10k and Half Marathon

5 km 10 km Half Marathon
Jun
7
Su

Swansea Half Marathon

Half Marathon
July 2026
Jul
11
Sa

Phoenix Running - Trelewis

Backyard Ultra 5 km 11 km Half Marathon 26 km
Jul
25
Sa

Saturn 7 Hour Time Challenge - Aberdare

3 km 7 km ... Marathon 50 km
Jul
25
Sa

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... 26 mi 50 km
Jul
26
Su

Pen Y Fan Challenge

Trail Run 5 mi 13 mi
August 2026
Aug
22
Sa

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... Marathon 50 km
September 2026
Sep
12
Sa

Phoenix Running - Trelewis

Backyard Ultra 5 km 11 km ... Marathon 7 hr
Sep
13
Su

Phoenix Running - Deri

5 km 10 km ... Marathon 7 hr