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Marathon Calendar Wales 2026-2027

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Monthly updates for Wales

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Explore the best marathons in Wales for 2026-2027! Our updated list features 35 exciting races across the region. Find your next race in Wales below and join the running community at these great events!

November 2026
Nov
21
Sa

Saturn Running - Aberdare

Backyard Ultra 3 km 5 km ... Marathon 50 km
Nov
28
Sa

Machen Trail Races

Trail Run 14 mi 26 mi
Nov
29
Su

South Wales - Christmas Advent Run

Backyard Ultra 5 km 10 km Half Marathon Marathon
December 2026
Dec
5
Sa

South Wales - Christmas Jumper Run

3 mi 10 km Half Marathon Marathon
Dec
6
Su

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

Trail Run Half Marathon Marathon 56 km
Dec
12
Sa

Celtic Trail Races

Trail Run 13 mi 26 mi 34 mi
Dec
20
Su

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... Marathon 50 km
February 2027
Feb
14
Su

Brecon to Cardiff Xtreme

Trail Run 26 mi 48 mi
Feb
28
Su

Saturn Running - Aberdare

Backyard Ultra 3 km 5 km ... Marathon 50 km
March 2027
Mar
7
Su

Barry 40 Mile Track Race

26 mi 40 mi
April 2027
Apr
18
Su

Newport Wales Marathon

10 km Half Marathon 26 mi
Apr
18
Su

Newport Marathon Festival

10 km 13 mi 26 mi
May 2027
May
9
Su

Excalibur Trail Races

Trail Run 10 km Half Marathon Marathon
May
29
Sa

Heart of Wales Line (HOWL)

Trail Run 16 mi 26 mi 50 mi
October 2027
Oct
17
Su

Great Welsh Marathon Events

10 km Half Marathon Marathon
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