Taking place on Saturday 24 and Sunday 25 April 2027.
This one‑off format change will see London Marathon Events transform the TCS London Marathon into a spectacular two-day celebration.
The event will welcome 100,000 participants across the two days, all taking on the same iconic route, from Greenwich to Westminster, in what will be an unprecedented weekend of sport, charity and community celebration.
We have an entry sponsorship ticket for the London Marathon 2027 on Sunday 25th April 2027.
Are you a Marathon runner who would like to run for FORGE, to support children with rare genetic disease?
If so, we would love to talk to you. Please contact us through this website.