What is The Big Half?
Organised by London Marathon Events, The Big Half is a vibrant, inclusive half marathon with a fun, festival atmosphere. The 13.1 mile course weaves through London from Tower Bridge to the iconic Cutty Sark in Greenwich.
The New Balance Big Relay covers the same course in four legs and the Big Mile is free, family-friendly event that takes place on the same finishing stretch, ending at the Cutty Sark.
The Big Half will take place on Sunday 7 September 2025. You can buy general entry for £56.50.
In 2024, it began at 08:25 with the Elite Wheelchair race, followed by the Elite Men and Women and the first mass wave at 08:30. Then waves every 10 minutes until 10:00.
