2025 The Big Half Participant Guide

Participant guide

Essential info

We can’t wait to welcome you on Sunday 7 September!

The Start Area is located in and around Tower Bridge, and there are two Assembly AreasNorth and South.

You’ll receive an email confirming which Start Area you’ve been allocated, but here’s a quick reminder to help you on the day:

  • If your bib number starts with ‘S’, head to the South Assembly Area
  • If your bib number starts with ‘N’, head to the North Assembly Area

South Assembly Area Guide

North Assembly Area Guide

Your Event Pack

If you live in the UK, you should receive it in the post by 2 September. If you have not received your pack by 3 September, please complete the replacement pack form

You must fill in the form and collect it from Marathon House, 190 Great Dover Street, London, SE1 4YB on Friday 5 September or Saturday 6 September.

If you live outside the UK, you’ll need to collect your Event Pack from Marathon House, 190 Great Dover Street, London, SE1 4YB during the following times:

  • 12:00 to 15:00 and 16:00 to 19:00 on Friday 5 September
  • 10:00 to 14:00 and 15:00 to 18:00 on Saturday 6 September

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