London will undergo its familiar annual transformation this weekend as the 2026 London Marathon takes over a route that winds through some of the capital’s most recognisable geography, from Greenwich Park through Canary Wharf and along the Embankment to the Mall finish line in front of Buckingham Palace.
The event, one of the six World Marathon Majors, draws elite International runners alongside tens of thousands of club runners and charity participants, generating an economic contribution to the city that organisers estimate runs well into the tens of millions of pounds.
The marathon arrives at a moment when London’s transport network is already recovering from the Easter disruption at Euston, adding an additional layer of planning complexity for the weekend.
Significant road closures will be in effect across south and east London from early Sunday morning, affecting bus diversions along routes including those through Tower Bridge, Blackfriars and the City itself. TfL has published detailed diversion maps for all affected services and is advising passengers who travel through the marathon corridor to build additional time into their journeys.
Elite field preparations have attracted attention in recent weeks, with Ethiopian and Kenyan runners dominating the entry lists in the men’s category alongside several European contenders who have been in strong form through the early spring racing season. The women’s field is similarly competitive, with a cluster of athletes targeting the London course record in conditions that early forecasts suggest will be cool but workable for fast marathon running. Wind direction on Sunday will be a determining factor in whether record attempts are viable in the back half of the race.
Charity fundraising remains one of the event’s defining features, with thousands of participants running for causes ranging from major health research organisations to local London charities addressing issues of poverty, mental health and homelessness. The broader social value of that fundraising — accumulated over 46 years of the marathon’s existence — represents a contribution to civil society that extends well beyond the race itself, making the event something that Londoners across different communities tend to regard with genuine collective pride rather than simply as a traffic disruption. Spectator crowds along the route are expected to be substantial, as they are each year, with particular concentration at the Cutty Sark, Tower Bridge and the final stretch through St James’s Park.