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Running Calendar near Cardiff Bay 2025-2026

Explore the top running races near Cardiff Bay for 2025-2026! We've gathered 110 exciting races in the area. Check out our detailed list below to find your next local race.

Half Marathons Marathons Trail Runs Triathlons
September 2026
Sep
6
Sunday

CDF 10K - Cardiff

10 km
Sep
18
Friday

The Relentless

Trail Run 50 mi 100 mi
Sep
19
Saturday

Trails & Tarmac Backyard Ultra

Backyard Ultra 4 mi
Sep
27
Sunday

RTT Margam 10k

Trail Run 5 km 10 km
October 2026
Oct
3
Saturday

The Hateful 8 Ultra Loop the Winter Series

9 mi
Oct
4
Sunday

Cardiff Half Marathon

Half Marathon
Oct
18
Sunday

Phoenix Running - Aberfan

Backyard Ultra 5 km 10 km Half Marathon Marathon
November 2026
Nov
14
Saturday

Dusk Till Dawn The Winter Edition

Backyard Ultra 32 mi
December 2026
Dec
19
Saturday

Nightmare before Xmas Trail ½ Marathon

Trail Run Half Marathon
July 2029
Jul
18
Wednesday

MTC Vampire

38 mi
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