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Running calendar Wales 2025-2026

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Explore the best running races in Wales for 2025-2026! Our updated list features 161 exciting races across the region. Find your next race in Wales below and join the running community at these great events!

December 2025
Dec
7
Sunday

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

Trail Run 13 mi 26 mi 33 mi
Dec
13
Saturday

Winter Celtic Trail Races

Trail Run 13 mi 26 mi 34 mi
Dec
20
Saturday

Nightmare before Xmas Trail ½ Marathon

Trail Run 26 mi
Dec
20
Saturday

Moel Famau Festive 'Piece of String' Race

Trail Run 12 km
January 2026
Jan
10
Saturday

The Winter Run to the Castle Ultra

26 mi 42 mi
Jan
11
Sunday

Vale of Clwyd 5k

5 km
Jan
18
Sunday

Cardiff Trail 10k

Trail Run 10 km
February 2026
Feb
15
Sunday

Nick Beer Llandudno 10k

10 km
March 2026
Mar
1
Sunday

Jones O Gymru Anglesey Half Marathon

10 km 13 mi
Mar
1
Sunday

Saturn Running - Aberdare

Backyard Ultra 5 km 7 km ... 26 mi 50 km
Mar
7
Saturday

Loggerheads Trail

Trail Run 10 km
Mar
14
Saturday

Nant yr Arian Silver Trail

Trail Run 2 mi 10 km 21 km
Mar
22
Sunday

Merthyr Half Marathon

13 mi
April 2026
Apr
14
Tuesday

MTC Angelystor

37 mi
Apr
14-19
Tu - Su

MTC Cymrun 26

256 mi
Apr
15
Wednesday

MTC Cerridwen

50 mi
Apr
16
Thursday

MTC Gelert

Trail Run 47 mi
Apr
17
Friday

MTC Pendragon

46 mi
Apr
18
Saturday

MTC Afanc

Trail Run 39 mi
Apr
19
Sunday

MTC Y Draig Goch

Trail Run 47 mi
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