2025 Swim Serpentine Participant Guide

Participant guide 

It's almost time

The Participant Guide is here!

We’re looking forward to seeing you on Saturday 20 September.

Make sure to read your Participant Guide carefully and keep it handy in case you need to access it easily on Swim Day Day.

Download the guide

Your Swim Pack

UK Participants

Your swim pack should arrive by post no later than Monday 15 September. If it hasn’t arrived by 5pm on that day, please complete the replacement pack form.

You’ll then need to collect your pack in person from Marathon House, 190 Great Dover Street, London, SE1 4YB on Friday 19 September.

International Participants

If you live outside the UK, you’ll need to collect your swim pack from Marathon House on Friday 19 September.

There’s no need to fill out a form - just pop in and our team will be ready to help.

Swim Day advice

Swim Serpentine buoys and kayakers

Sponsors and Partners