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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 38 exciting races across the region. Find your next race in Wales below and join the running community at these great events!

March 2026
Mar
1
Sunday

Saturn Running - Aberdare

Backyard Ultra 3 km 7 km ... Marathon 50 km
Mar
14
Saturday

Nant yr Arian Silver Trail

Trail Run 2 mi 3 mi 10 km Half Marathon
Mar
22
Sunday

Merthyr Half Marathon

Half Marathon
Mar
29
Sunday

Llandudno Half Marathon

10 mi Half Marathon
April 2026
Apr
5
Sunday

Pendine Sands Races

Trail Run 5 km 10 km Half Marathon Marathon
Apr
11
Saturday

RTT Gower Trail Half Marathon

Trail Run 5 km 10 km Half Marathon
Apr
19
Sunday

Newport Wales Marathon

10 km Half Marathon Marathon
Apr
25
Saturday

Endurancelife | Pembrokeshire

Trail Run 8 mi 13 mi 27 mi 35 mi
Apr
26
Sunday

Saturn 7 Hour Time Challenge - Aberdare

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

Saturn Running - Aberdare

Backyard Ultra 3 km 7 km ... Marathon 50 km
May 2026
May
10
Sunday

Snowdonia Half Marathon

Half Marathon
May
16
Saturday

True Grit Trail Half Marathon

Trail Run 13 mi
May
30
Saturday

Saturn Running - Aberdare

Backyard Ultra 3 km 7 km ... Marathon 50 km
June 2026
Jun
7
Sunday

Swansea Half Marathon

13 mi
July 2026
Jul
12
Sunday

Snowdonia Trail Marathon Eryri

Trail Run 10 km Half Marathon Marathon
Jul
26
Sunday

Pen Y Fan Challenge

Trail Run 5 mi 13 mi
August 2026
Aug
15
Saturday

Chepstow Running Festival Half Marathon

5 km 10 km Half Marathon
September 2026
Sep
13
Sunday

Lake Vyrnwy Half Marathon

Half Marathon
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