The Great Welsh Marathon on 17 October 2027 is South Wales' oldest marathon.
In 2027 the event moves to Swansea for the first time, on a flat and fast coastal city route, suitable for runners of all abilities from first-timers to PB chasers.
This event is a World Marathon Majors Qualifying Race.
The headline charity partner is Cancer Research Wales.
Marathon
The event venue is TBC.
Please note: the map location may be approximate. Refer to the event website for start lines and course maps.
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This listing was last manually checked on 21 October 2026.
