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Half Marathon calendar Wales 2025-2026

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Explore the best half marathons in Wales for 2025-2026! Our updated list features 42 exciting races across the region. Find your next race in Wales below and join the running community at these great events!

February 2025
Feb
8
Saturday

The Cardiff Half Marathon Winter Warmer Run

5 km 10 km 13 mi
Feb
15
Saturday

Secret Santa Series - Llanbedr

Trail Run 12 km 10 mi 13 mi
Feb
16
Sunday

Llanelli Running Events

10 km 21 km
Feb
22
Saturday

Saturn 7 Hour Time Challenge - Aberdare

5 km 7 km ... 42 km 50 km
Feb
22
Saturday

Afan Forest Trail Half Marathon

10 km 13 mi
March 2025
Mar
1
Saturday

Saturn 7 Hour Time Challenge - Aberdare

5 km 7 km ... 42 km 50 km
Mar
1
Saturday

St David's Day Run

5 km 10 km 13 mi
Mar
2
Sunday

Jones O Gymru Anglesey Half Marathon

10 km 13 mi
Mar
2
Sunday

City Of Newport Half Marathon

13 mi
Mar
8
Saturday

Gower Gallop Trail Races

Trail Run 5 km 10 km 13 mi
Mar
16
Sunday

Merthyr Half Marathon

13 mi
Mar
16
Sunday

Great Welsh Marathon Events

10 km 13 mi 26 mi
Mar
22
Saturday

Saturn 7 Hour Time Challenge - Aberdare

5 km 7 km ... 42 km 50 km
Mar
22
Saturday

Nant yr Arian Silver Trail

Trail Run 2 mi 10 km 21 km
April 2025
Apr
13
Sunday

The Pendine Sands Races

Trail Run 5 km 10 km 13 mi 26 mi
Apr
13
Sunday

Summit 2 Sea - The Offa's Dyke Half Marathon

Trail Run 13 mi
Apr
13
Sunday

Newport Wales Marathon

10 km 13 mi 26 mi
Apr
26
Saturday

Endurancelife | Pembrokeshire

Trail Run 10 km 13 mi 26 mi 34 mi
May 2025
May
10
Saturday

Cadair X

Trail Run 13 mi
May
10
Saturday

Afan Chase Trail Races

Trail Run 10 km 13 mi
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