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Marathon Calendar near Brecon 2025-2026

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Explore the top marathons near Brecon for 2025-2026! We've gathered 17 exciting races in the area. Check out our detailed list below to find your next local race.

December 2025
Dec
6
Sa

Phoenix Running - Aberfan

Backyard Ultra 5 km 10 km ... Marathon 7 hr
Dec
7
Su

Phoenix Running - Merthyr Tydfil

5 km 10 km Half Marathon Marathon
Dec
13
Sa

Celtic Trail Races

Trail Run 13 mi 26 mi 34 mi
January 2026
Jan
24
Sa

Saturn Running - Cwmdare

Trail Run 3 km 7 km ... Marathon 50 km
Jan
24
Sa

Saturn Running - Aberdare

Backyard Ultra 3 km 5 km ... Marathon 50 km
March 2026
Mar
1
Su

Brecon to Cardiff Xtreme

Trail Run Marathon 75 km
Mar
1
Su

Saturn Running - Cwmdare

Trail Run 3 km 7 km ... Marathon 50 km
Mar
15
Su

Saturn Running - Cwmdare

Trail Run 3 km 7 km ... Marathon 50 km
April 2026
Apr
26
Su

Saturn 7 Hour Time Challenge - Aberdare

3 km 7 km ... Marathon 50 km
Apr
26
Su

Saturn Running - Cwmdare

Trail Run 3 km 7 km ... Marathon 50 km
May 2026
May
16
Sa

OTT Marathon

Trail Run 10 mi 26 mi
May
30
Sa

Saturn Running - Cwmdare

Trail Run 3 km 7 km ... Marathon 50 km
June 2026
Jun
6
Sa

Midnight Mountain Marathon

Trail Run Half Marathon Marathon
July 2026
Jul
11
Sa

Black Mountains 50

Trail Run 13 mi 26 mi 32 mi 50 mi
Jul
25
Sa

Saturn 7 Hour Time Challenge - Aberdare

3 km 7 km ... Marathon 50 km
Jul
25
Sa

Saturn Running - Cwmdare

Trail Run 3 km 7 km ... Marathon 50 km
October 2026
Oct
18
Su

Phoenix Running - Aberfan

Backyard Ultra 3 mi 10 km Half Marathon Marathon