This popular Swim Serpentine event takes in two laps of the world-famous lake in London’s Hyde Park. It's the perfect option if you’re looking to complete a memorable swim at your own pace, or making the transition from the pool to open water. Plus, this distance is part of the London Classics, so if you've completed the London Marathon and RideLondon 100, you'll receive an extra London Classics medal.
How to enter
Charity places - sold out.
Our 2 mile places have now sold out. You can still sign up to join us in the 1 mile distance.
Or you can join the waiting list for our 2 mile places and we'll be in touch if a space becomes available. There is a £25 registration fee and £150 fundraising target.
You must be aged 16+ on the event day to take part.
Got your own place?
If you’ve already got your own place in Swim Serpentine, we’d love to have you on Team CALM! There’s no minimum fundraising target, just raise as much as you can. Join Team CALM here.
How we’ll support you:
Whether it’s your first time taking on a challenge or you’re a seasoned pro, we’ll be right there with you every step of the way. We’ll make sure you have a fantastic experience being on Team CALM. When you join our team, you’ll receive:
Fundraising and training advice and resources
The Team CALM cheer squad to give you a boost on the day
CALM kit so you can look the part
A dedicated Fundraising Team to support you
The Swim Serpentine team supports participants with a range of disabilities at this event, and have included a number of measures to help swimmers who require assistants to feel safe and confident when taking part, including:
A ramped entrance into and exit out of the Serpentine
Assistance with entering and exiting the water
Accessible toilets and changing facilities
If you have any questions about accessibility at this event, please contact the event organisers.
Got a question?
Check out our FAQs. If you can’t find an answer there, get in touch and we’ll be happy to help.