A large group of marathon runners is participating in a road race. The image shows their training and them wearing number bibs.

The Big Half

Sight Research UK runners will be appearing at this year’s Big Half on 6 September 2026.

The Details:

The Big Half is a vibrant and inclusive half marathon with a fun and festive atmosphere. This is an incredible opportunity for runners at all levels and abilities to run part of the iconic London Marathon course on behalf of Sight Research UK.

When?

Sunday 6 September 2026

Where?

Tower Bridge, London (starting point)

Distance?

Half marathon. 13.1 miles / 21.1 km

Group of marathon runners participating in a road race, wearing numbered bibs, running through a city street with historic buildings in the background.

Are you running at the Big Half 2026?

You can fundraise for Sight Research UK if you’ve secured a general entry slot at the Big Half. There’s no entry fee and no fundraising goal if you would like to support sight-saving research as a non-charity entrant.

Just let us know so we can support you along your fundraising journey by emailing hello@sightresearchuk.org.

If you want to stay in the loop about future events (like the Big Half) where you can make a difference, sign up to our newsletter:

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