Half Marathon Calendar Wales 2025-2026

Dec

6

Saturday

Secret Santa Tinsel Half Marathon

Black Mountains, Wales, Wales

Trail Run 14 km 10 mi 13 mi

Dec

7

Sunday

Sea 2 Summit - Offa's Dyke Half/Full/Ultra

Prestatyn, Wales

Trail Run 13 mi 26 mi 33 mi

Dec

13

Saturday

Celtic Trail Races

Aberdare, Wales

Trail Run 13 mi 26 mi 34 mi

Dec

20

Saturday

Nightmare before Xmas Trail ½ Marathon

Aberkenfig, Wales

Trail Run 13 mi

Dec

21

Sunday

Saturn Running - Aberdare

Aberdare, Wales

Backyard Ultra 3 km 7 km ... 26 mi 50 km

Jan

24

Saturday

Saturn Running - Aberdare

Aberdare, Wales

Backyard Ultra 3 km 7 km ... 26 mi 50 km

Jan

25

Sunday

Chepstow Running Festival Half Marathon

Saint Arvans, Wales

5 km 10 km 13 mi

Feb

1

Sunday

The Cardiff Half Marathon Winter Warmer Run

Cardiff, Wales

5 km 10 km 13 mi

Mar

1

Sunday

Jones O Gymru Anglesey Half Marathon

Menai Bridge, Wales

10 km 13 mi

Mar

1

Sunday

Saturn Running - Aberdare

Aberdare, Wales

Backyard Ultra 3 km 7 km ... 26 mi 50 km

Mar

14

Saturday

Nant yr Arian Silver Trail

Ystumtuen, Wales

Trail Run 2 mi 10 km 21 km

Mar

22

Sunday

Merthyr Half Marathon

Merthyr Tydfil, Wales

13 mi

Apr

5

Sunday

Pendine Sands Races

Laugharne, Wales

Trail Run 5 km 10 km 13 mi 26 mi

Apr

12

Sunday

Summit 2 Sea - The Offa's Dyke Half Marathon

Prestatyn, Wales

Trail Run 13 mi

Apr

19

Sunday

Newport Wales Marathon

Newport, Wales

10 km 13 mi 26 mi

Apr

25

Saturday

Endurancelife | Pembrokeshire

Haverfordwest, Wales

Trail Run 10 km 13 mi 26 mi 34 mi

Apr

26

Sunday

Saturn 7 Hour Time Challenge - Aberdare

Aberdare, Wales

3 km 7 km ... 42 km 50 km

Apr

26

Sunday

Saturn Running - Aberdare

Aberdare, Wales

Backyard Ultra 3 km 7 km ... 26 mi 50 km

May

10

Sunday

Snowdonia Half Marathon

Llanrwst, Wales

13 mi

Jun

7

Sunday

Swansea Half Marathon

Swansea, Wales

13 mi