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Half Marathon Calendar near Cardiff Bay 2025-2026

Explore the top half marathons near Cardiff Bay for 2025-2026! We've gathered 31 exciting races in the area. Check out our detailed list below to find your next local race.

May 2026
May
16
Saturday

True Grit Trail Half Marathon

Trail Run 13 mi
May
30
Saturday

Saturn Running - Cwmdare

Trail Run 3 km 7 km ... Marathon 50 km
June 2026
Jun
14
Sunday

Cheddar Gorge Challenge

Trail Run 3 km 6 km ... Half Marathon Marathon
July 2026
Jul
19
Sunday

Wye Valley Tunnel Run

Trail Run 10 km Half Marathon Marathon
Jul
25
Saturday

Saturn 7 Hour Time Challenge - Aberdare

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

Saturn Running - Cwmdare

Trail Run 3 km 7 km ... Marathon 50 km
August 2026
Aug
15
Saturday

Chepstow Running Festival Half Marathon

5 km 10 km Half Marathon
September 2026
Sep
6
Sunday

Bridgwater Half Marathon

10 km Half Marathon
October 2026
Oct
4
Sunday

Cardiff Half Marathon

Half Marathon
Oct
18
Sunday

Phoenix Running - Aberfan

Backyard Ultra 5 km 10 km Half Marathon Marathon
December 2026
Dec
19
Saturday

Nightmare before Xmas Trail ½ Marathon

Trail Run Half Marathon
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