The Big Half

The Big Half is a vibrant, inclusive half marathon with a fun, festival atmosphere taking place on 6th September 2026.
Sign up to the Big Half

    Key details

    Date: 6th September 2026

    Where: London

    Cost: £15 entry fee and a minimum sponsorship target of £350

    This is an incredible opportunity to run part of the iconic London Marathon course on fully closed roads. The 13.1 mile course weaves through London from Tower Bridge to the iconic Cutty Sark in Greenwich.

    Any questions please email our fundraising team. Good luck!

    The Big Half route takes you past London's remarkable Tower Bridge  |  Image credit: Shannon Tremaine

    What we provide

    You'll receive a Marine Conservation Society running vest or t-shirt for your run - just drop our friendly fundraising team an email to let them know what size you need.

    If you are looking for ways to reach the minimum target of £350 sponsorship, get inspired by our creative fundraising ideas.

    Your 'Enthuse' fundraising page will automatically be created when you run for the sea with the Marine Conservation Society. Places are limited and always in demand for this popular race, so please register soon to secure yours. Good luck.

    A Big Half fundraiser for Marine Conservation Society. They are wearing a branded MCS running vest

    One of our previous Marine Conservation Society runners celebrating with her medal  |  Image credit: Andreea Cioca

    Ready to sign up?

    Register for the Big Half