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Running Calendar Wales 2025-2026

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Monthly updates for Wales

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Explore the best running races in Wales for 2025-2026! Our updated list features 217 exciting races across the region. Find your next race in Wales below and join the running community at these great events!

Half Marathons Marathons Trail Runs Triathlons
December 2025
Dec
31
We

New Years Eve Ready Races

10 km 10 mi
January 2026
Jan
1
Th

The Prince of Wales New Year's Day Race

6 km
Jan
10
Sa

The Winter Run to the Castle Ultra

Marathon 42 mi
Jan
10
Sa

Reservoir Roundabout

Trail Run 12 mi 20 mi
Jan
11
Su

Vale of Clwyd 5k

5 km
Jan
17
Sa

Arthur Bebbington Twin Piers 10k

3 km 10 km
Jan
18
Su

Cardiff Trail 10k

Trail Run 10 km
Jan
18
Su

Guided Trail Run - Eyarth Rocks and Graig Wyllt

Trail Run 12 km
Jan
18
Su

CF64 Winter Race

Trail Run 6 mi
Jan
18
Su

West Glamorgan XC League - Margam Park

Trail Run 5 mi
Jan
24
Sa

Tour De Yr Wyddfa

Trail Run 22 km 44 km
Jan
24
Sa

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... Marathon 50 km
Jan
24
Sa

Saturn Running - Aberdare

Backyard Ultra 3 km 5 km ... Marathon 50 km
Jan
25
Su

Chepstow Running Festival Half Marathon

5 km 10 km Half Marathon
Jan
25
Su

Resolution Run 5k

5 km
Jan
25
Su

Phoenix Running - Trelewis

Backyard Ultra 5 km 10 km Half Marathon Marathon
Jan
31
Sa

Tarrenhendre Fell Race

Trail Run 6 mi
February 2026
Feb
1
Su

The Cardiff Half Marathon Winter Warmer Run

5 km 10 km Half Marathon
Feb
1
Su

West Glamorgan XC League - Kenfig Nature Reserve

Trail Run 4 mi
Feb
14
Sa

Trails & Tarmac Backyard Ultra

Backyard Ultra 4 mi