London Marathon Might Be Splitting In Two

The London Marathon could be about to outgrow itself.

Plans are being quietly worked on that would see the race expanded into a two-day event as early as 2027, opening the door for around 100,000 runners to take part across a single weekend. If it goes ahead, it would be unlike anything the sport has seen before.

As first reported by The Guardian today, discussions are already underway around staging the event across Saturday and Sunday, with backing at city level being considered as part of the process.

At the centre of the proposal is a simple reality: the race has become too popular for its own format.

A Famed Marathon That Can’t Keep Up With Demand

Getting into London has turned into a long shot. The ballot has ballooned in recent years, with well over a million applicants chasing a limited number of places. Even experienced runners are being turned away year after year.

Stretching the event across two days would effectively double capacity overnight. Instead of squeezing everyone into one start line, the race would be split across Saturday and Sunday, with tens of thousands taking part on each day.

For the average runner, that’s the headline. More places. Better odds. Less frustration.

The Bigger Play Behind The Scenes

But the real story sits behind the numbers.

London isn’t just a marathon. It’s the biggest annual fundraising event of its kind anywhere in the world. Each year it pulls in staggering amounts for charity, and increasing participation isn’t just about inclusion, it’s about scale.

A second race day means:

-  More runners raising money

-  More corporate entries

-  More sponsorship exposure

-  More people travelling into the city

In blunt terms, doubling the field means a serious jump in revenue and charitable income.

A Different Look For The Elite Race?

One of the more interesting knock-on effects is how it could reshape the top end of the sport.

Splitting the event across two days opens the door to separating the elite races. That would give both the men’s and women’s events their own stage rather than sharing the same broadcast window. From a coverage point of view, that’s a major shift.

It also edges the event closer to a festival model rather than a single race.

Nothing Set in Stone Yet

For all the ambition, this isn’t signed off.

Closing London’s roads for one day is already a huge operation. Doing it twice in the same weekend raises obvious questions around logistics, cost and disruption. Transport, policing and volunteer capacity would all need to scale up.

That’s where the political backing comes in. Early signals suggest support at city level, but this only moves forward if the practical side stacks up.

Is This A Glimpse Of Where Big City High Demands Marathons Are Heading?

What makes this interesting isn’t just London itself, but what it represents.

Major marathons are under pressure from both ends:

-  Demand from mass participation runners keeps climbing

-  Commercial and charity expectations keep growing

Expanding into a multi-day format might be the next logical step. If London proves it can work, others will be watching closely.

For now, it sits in that in-between space. Not confirmed, but not far-fetched either.

And if it does happen, missing out on a London Marathon place might soon become a bit less painful.