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Marathon Calendar near Trethomas 2026-2027

Monthly updates for Trethomas

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

Explore the top marathons near Trethomas for 2026-2027! We've gathered 26 exciting races in the area. Check out our detailed list below to find your next local race.

September 2026
Sep
13
Su

Phoenix Running - Deri

5 km 10 km ... Marathon 7 hr
October 2026
Oct
17
Sa

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... Marathon 50 km
Oct
18
Su

Phoenix Running - Aberfan

Backyard Ultra 5 km 10 km Half Marathon Marathon
December 2026
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
28
Su

Saturn Running - Cwmdare

Trail Run 3 km 5 km ... Marathon 50 km