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Marathon Calendar near Merthyr Tydfil 2025-2026

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Monthly updates for Merthyr Tydfil

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

Explore the top marathons near Merthyr Tydfil for 2025-2026! We've gathered 27 exciting races in the area. Check out our detailed list below to find your next local race.

July 2026
Jul
25
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
October 2026
Oct
18
Su

Phoenix Running - Aberfan

Backyard Ultra 5 km 10 km Half Marathon Marathon
November 2026
Nov
7
Sa

Beacons Ultra

Trail Run 13 mi 26 mi 49 mi
December 2026
Dec
12
Sa

Celtic Trail Races

Trail Run 13 mi 26 mi 34 mi
Dec
20
Su

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... Marathon 50 km