Name: The Big Half
Start: 2026-09-06
End: 2026-09-06
Location: London

Same event — which distance suits you?

Distances compared at The Big Half
Distance
Half Marathon
Relay

Half Marathon

Detailed metrics are still being populated.

Relay

Detailed metrics are still being populated.

Detailed sibling-distance metrics are still being populated. Click a distance for its full page.

Compare distances at this event

Half Marathon vs Relay
Same-event comparison for route, cost and available evidence.

Same-event questions

What distances does The Big Half offer?

The Big Half offers Half Marathon, Relay, all run from the same event.

Typical conditions on race weekend

17°CTypical temperature
19 kphTypical wind
1 mmTypical rainfall
72Favourability /100

Typical conditions for the race date and locality, warmer than the endurance-optimal window. These are climatological norms, not a forecast, and are shared across every distance at this event.

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Source-backed sections

race-day conditions and source facts are shown on this event page. Sections appear only when their source-backed data is available.

The Big Half

Same event — which distance suits you?

Half Marathon

Relay

Compare distances at this event

Half Marathon vs Relay

Same-event questions

What distances does The Big Half offer?

Typical conditions on race weekend

Explore each distance

Half Marathon

Relay

How we calculated this

Source-backed sections

The Big Half

Same event — which distance suits you?

Half Marathon

Relay

Compare distances at this event

Half Marathon vs Relay

Same-event questions

What distances does The Big Half offer?

Typical conditions on race weekend

Explore each distance

Half Marathon

Relay

How we calculated this

Source-backed sections