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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!

May 2026
May
16
Sa

OTT Marathon

Trail Run 10 mi 26 mi
May
23
Sa

True Grit Trail Marathon

Trail Run 26 mi
May
30
Sa

Saturn 7 Hour Time Challenge - Aberdare

3 km 5 km ... Marathon 50 km
May
30
Sa

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... Marathon 50 km
May
30
Sa

Phoenix Running - Trelewis

Backyard Ultra 5 km 10 km Half Marathon Marathon
June 2026
Jun
6
Sa

Midnight Mountain Marathon

Trail Run 13 mi 26 mi
Jun
6
Sa

The North Wales Pilgrim Trail Marathon

Trail Run Marathon
Jun
21
Su

Saturn Running - Aberdare

Backyard Ultra 3 km 5 km ... Marathon 50 km
Jun
28
Su

Phoenix Running - Bridgend

5 km 10 km Half Marathon Marathon
July 2026
Jul
8-12
We - Su

The MTC Severn Challenge

Trail Run 26 mi 30 mi ... 59 mi 220 mi
Jul
11
Sa

Phoenix Running - Trelewis

Backyard Ultra 5 km 10 km Half Marathon Marathon
Jul
18-19
Sa - Su

Gower Peninsula Ultra Challenge

Trail Run 10 km 25 km ... 50 km 100 km
Jul
25
Sa

Saturn 7 Hour Time Challenge - Aberdare

3 km 4 mi ... Marathon 50 km
Jul
25
Sa

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... Marathon 50 km
August 2026
Aug
15
Sa

Run to the Castle Ultra

26 mi 42 mi
Aug
22
Sa

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... Marathon 50 km
Aug
29-30
Sa - Su

Cardiff Pentath-Run

5 km 10 km Half Marathon Marathon
September 2026
Sep
12
Sa

Phoenix Running - Trelewis

Backyard Ultra 5 km 11 km ... Marathon 7 hr
Sep
13
Su

Phoenix Running - Deri

5 km 10 km ... Marathon 7 hr
October 2026
Oct
3
Sa

Saturn Running - Aberdare

Backyard Ultra 3 km 5 km ... Marathon 50 km
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