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Marathon Calendar Wales 2026-2027

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Explore the best marathons in Wales for 2026-2027! 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!

October 2026
Oct
3
Sa

Saturn Running - Aberdare

Road Race Trail Run Backyard Ultra 3 km 5 km ... Marathon 50 km
Oct
17
Sa

Saturn Running - Aberdare

Road Race Trail Run Backyard Ultra 3 km 5 km ... Marathon 50 km
Oct
18
Su

Phoenix Running - Aberfan

Backyard Ultra 5 km 10 km Half Marathon Marathon
Oct
24
Sa

Marathon Eryri

Marathon
Oct
31
Sa

Phoenix Running - Trehafod

Road Race Backyard Ultra 5 km 10 km Half Marathon Marathon
Monthly updates for Wales

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November 2026
Nov
7
Sa

Endurancelife | Gower

Trail Run 10 km Half Marathon Marathon 55 km
Nov
7
Sa

Beacons Ultra

Trail Run 13 mi 26 mi 49 mi
Nov
14
Sa

South Wales - Lest We Forget

Road Race Backyard Ultra 5 km 10 km Half Marathon Marathon
Nov
21
Sa

Saturn Running - Aberdare

Road Race Trail Run Backyard Ultra 3 km 5 km ... Marathon 50 km
Nov
28
Sa

Machen Trail Races

Trail Run 14 mi 26 mi
Nov
28
Sa

Phoenix Running - Trelewis

Road Race Trail Run Backyard Ultra 5 km 10 km Half Marathon Marathon
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

5 km 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
Dec
20
Su

Saturn Running - Aberdare

Road Race Trail Run Backyard Ultra 5 km 10 km ... 26 mi 50 km
Dec
27
Su

Phoenix Running - Trehafod

Road Race Backyard Ultra 5 km 10 km Half Marathon Marathon
January 2027
Jan
24
Su

Saturn Running - Aberdare

Road Race Trail Run Backyard Ultra 3 km 5 km ... Marathon 50 km
February 2027
Feb
14
Su

Brecon to Cardiff Xtreme

Trail Run 26 mi 48 mi
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