Marathons and running races in United Kingdom

18 marathons, 26 half marathons and 9 ultras in United Kingdom.

The next one is the Chester Marathon on 11 October 2026.

The flattest marathon is the Windsor Dorney Lakeside Marathon (10 m of climbing); the hilliest is the Beachy Head Marathon (1,150 m).

For cool racing conditions, the Southampton Marathon usually starts around 9°C.

The biggest field is at the London Marathon, with about 59,800 finishers.