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Marathon Calendar Wales 2025-2026

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Explore the best marathons in Wales for 2025-2026! Our updated list features 25 exciting races across the region. Find your next race in Wales below and join the running community at these great events!

April 2026
Apr
25
Saturday

Endurancelife | Pembrokeshire

Trail Run 10 km 13 mi 26 mi 34 mi
Apr
26
Sunday

Saturn 7 Hour Time Challenge - Aberdare

3 km 7 km ... 42 km 50 km
Apr
26
Sunday

Saturn Running - Aberdare

Backyard Ultra 3 km 7 km ... 26 mi 50 km
July 2026
Jul
8-12
We - Su

Severn Challenge

Trail Run 26 mi 30 mi ... 59 mi 220 mi
Jul
11
Saturday

Xterra Snowdonia Trail Marathon Eryri

Trail Run 10 km 13 mi 26 mi
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