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Running Calendar near Trethomas 2025-2026

Monthly updates for Trethomas

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

Explore the top running races near Trethomas for 2025-2026! 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
December 2025
Dec
14
Su

Brackla Harriers' Merthyr Mawr Christmas Pudding Race

10 km
Dec
20
Sa

Nightmare before Xmas Trail ½ Marathon

Trail Run 13 mi
Dec
20
Sa

Saturn Running - Cwmdare

Trail Run 3 km 5 km
Dec
26
Fr

Festive 5 Boxing Day Race

Dec
26
Fr

Porthcawl Boxing Day Run

7 km
Dec
28
Su

Phoenix Running - Trehafod

5 km
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 7 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
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