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Running Calendar near Cardiff Bay 2026-2027

Monthly updates for Cardiff Bay

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

Explore the top running races near Cardiff Bay for 2026-2027! We've gathered 119 exciting races in the area. Check out our detailed list below to find your next local race.

Half Marathons Marathons Trail Runs Triathlons
January 2026
Jan
1
Th

The Prince of Wales New Year's Day Race

6 km
Jan
17
Sa

Dark Skies Series

Trail Run 5 km 10 km
Jan
18
Su

Cardiff Trail 10k

Trail Run 10 km
Jan
18
Su

Riverbank Rollick

Trail Run 10 mi
Jan
18
Su

CF64 Winter Race

Trail Run 6 mi
Jan
18
Su

West Glamorgan XC League - Margam Park

Trail Run 5 mi
Jan
24
Sa

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... Marathon 50 km
Jan
24
Sa

Saturn Running - Aberdare

Backyard Ultra 3 km 5 km ... Marathon 50 km
Jan
25
Su

Chepstow Running Festival Half Marathon

5 km 10 km Half Marathon
Jan
25
Su

Phoenix Running - Trelewis

Backyard Ultra 5 km 10 km Half Marathon Marathon
February 2026
Feb
1
Su

The Cardiff Half Marathon Winter Warmer Run

5 km 10 km Half Marathon
Feb
1
Su

West Glamorgan XC League - Kenfig Nature Reserve

Trail Run 4 mi
Feb
14
Sa

Trails & Tarmac Backyard Ultra

Backyard Ultra 4 mi
Feb
14
Sa

The Bristol 5K and 10K Winter Warmer Run

5 km 10 km
Feb
14
Sa

Phoenix Running - Trelewis

Backyard Ultra 5 km 10 km Half Marathon Marathon
Feb
15
Su

Pontypool 10K Home Run

10 km
Feb
22
Su

Ironwood Challenge

Trail Run
Feb
22
Su

Sorbrook Slog

Trail Run 7 mi
March 2026
Mar
1
Su

Brecon to Cardiff Classic

Trail Run 70 km
Mar
1
Su

Brecon to Cardiff Xtreme

Trail Run Marathon 75 km