Revealed: secret plans for two-day London Marathon with 100,000 runners

March 25, 2026

The London Marathon is in advanced talks about staging a two-day event in 2027, allowing tens of thousands more runners to take part in the iconic race and to raise tens of millions more for charity.

While the Double London Marathon, as it is being called internally, has not been granted formal approval it is believed to have the backing of the mayor’s office for it to be staged on Saturday 24 and Sunday 25 April next year.

The one-off event would allow a world-record 100,000 amateur runners to take part over the weekend, with 50,000 running the course on each day. It is also expected that the elite men’s and women’s races would also be staged on separate days, in what would be a celebration of top-level and grassroots sport. The Guardian