The Big Half, London

The Big Half 2026

London
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6 September 2026 Running Half Marathon Best valueTower BridgeMarathon rehearsal

A big-city half from the London Marathon team: Tower Bridge, the Highway, and a finish by the Cutty Sark, from £15.

Terrain
Road
Closed city roads
Elevation
Flat
80m gain
Entry
£15+
From £15, variable
Region
London
London
Your runway

4 weeks to race day: the sharpening window

A full build no longer fits, but a sharp one does. This close in, the job is specificity and freshness: race-pace touches, open-water or brick rehearsal, and a taper your nervous system actually absorbs. No heroics; arrive fresh.

R
Recover
Fix the nervous system first. Sleep, HRV, and the noise out.
A
Align
Fit the plan to your actual life, not the one you wish you had.
C
Condition
Minimum effective dose. The right sessions, done fresh.
E
Execute
Race-week protocol, pacing, contingency. Nothing new on race day.
Predict your finish time Training plans

Building for this one? Training plans cover the sessions, the weekly shape and how the block is paced. The R.A.C.E. Framework explains why it is built that way.

Abraham Spring, founder of Unbroken

“London Marathon's little sibling and the perfect dress rehearsal: same organisers, same energy, a third of the distance.”

Abraham Spring: founder, Unbroken

The race

The Big Half compresses the London Marathon experience into 13.1 miles across the same iconic ground, Tower Bridge included. It is deliberately accessible, with entries from £15 and a community wave culture. For anyone building toward a spring marathon it is the ideal autumn checkpoint race.

Questions, answered

When is The Big Half 2026?

The Big Half takes place on 6 September 2026.

What distances can I race at The Big Half?

Half Marathon. Whichever you choose, anchor a structured block to the date and let your readiness shape each week.

How hard is the course?

Road terrain, flat profile with around 80m of climbing. Closed city roads

How long do I need to train for it?

From today you have 4 weeks. Focus on sharpening and freshness rather than fitness you can no longer build.

How do I enter?

Entries are handled by the organiser, from £15. Use the Register button above: it goes straight to the official site.

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Photograph of London: mattbuck (category), CC BY-SA 4.0, via Wikimedia Commons. Not official race photography.

This listing is for information only. Unbroken is not affiliated with, endorsed by, or sponsored by The Big Half or its organiser. Details are based on publicly available information; names are used descriptively to identify the event. For accurate, up-to-date information and to enter, always use the official event website.

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