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Marathon Calendar near Cosmeston Lakes Country Park 2026-2027

Monthly updates for Cosmeston Lakes Country Park

Get new running races (and updates) in your inbox every month.

Explore the top marathons near Cosmeston Lakes Country Park for 2026-2027! We've gathered 25 exciting races in the area. Check out our detailed list below to find your next local race.

July 2026
Jul
11
Sa

Phoenix Running - Trelewis

Backyard Ultra 3 mi 10 km Half Marathon Marathon
Jul
19
Su

Wye Valley Tunnel Run

Trail Run 10 km Half Marathon Marathon
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 5 km ... 49 km 50 km
August 2026
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
Oct
17
Sa

Saturn Running - Aberdare

Backyard Ultra 3 km 5 km ... Marathon 50 km
Oct
18
Su

Phoenix Running - Aberfan

Backyard Ultra 5 km 10 km Half Marathon Marathon
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
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
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