Swim Serpentine is a one-day open water swimming festival staged in the heart of London.

Organised by London Marathon Events, the festival is held in and around the beautiful Serpentine in Hyde Park, the venue for the open water swimming competition at the London 2012 Olympic Games.

  • Date: 16 September 2017
  • Distance: 1 mile open water swim
  • Location: The Serpentine, London
  • Entry fee: Free!
  • Minimum sponsorship: £250

Find out more

Full details of this event can be found at the Swim Serpentine website. If you are interested in joining our swim team please contact [email protected] for more information.

If you have secured a place in a different open-water swim and want to raise money for the Royal Marsden, email us today to join Team Marsden.

Sponsorship and fundraising

We recommend you use JustGiving for online fundraising: create a fundraising page here.

Find us on Facebook

Become a fan of The Royal Marsden Cancer Charity on Facebook to see some of our previous challenge event participants’ photos.


For more information about this event, please email [email protected]  or call 0208 915 6094.