How to Enter

Online Entry

Entering Swim Serpentine

Online entry for all events at Swim Serpentine is now open. Entry is on a first come, first served basis so enter now to avoid disappointment.

Half-Mile Swim

New for 2017, the half-mile distance offers participants of all abilities aged 12 and upwards the opportunity to take on an open water swim.

Entry costs £25. Entrants must be at least 12 years old on Saturday 16 September 2017.

One-Mile Swim

The hugely-popular one-mile swim is back for 2017 and up to 6,000 swimmers will be accepted into this mass-participation event.

Entry costs £39. Entrants must be at least 16 years old on Saturday 16 September 2017.

Two-Mile Swim

A two-mile swim has also been added to the programme for 2017.

Entry costs £49. Entrants must be at least 16 years old on Saturday 16 September 2017.

Super Six

The Super Six challenge offers swimmers the chance to take on the challenge of swimming a total of six miles in five different races during the day.

Entry costs £150 and is limited to 60 swimmers. Entrants must be at least 18 years old on Saturday 16 September 2017.

Entries for all events close at 17:00 on Thursday 27 July 2017.

Wetsuit & tow-float hire

Wetsuits are optional when the water temperature is over 15 degrees. However, for safety reasons, all swimmers must either wear a wetsuit or use a tow-float for all Swim Serpentine events.

As an official partner of Swim Serpentine, HUUB will provide wetsuits, swimwear and swim accessories to all swimmers looking to hire or purchase equipment for the event. Visit the HUUB Swim Serpentine page for more details.

Choosing your wave

The Swim Serpentine events will comprise a number of waves (groups).

If you enter Swim Serpentine, we will send you an email asking you to choose your wave, so you'll be able to swim with friends and family if you’d like to. If you do not choose a wave, you will be allocated one according to your predicted finishing time.

Change of address

If you change your address after applying, please email changeofaddress@londonmarathonevents.co.uk with your name, date of birth, telephone number, old address and your new address.

Your address details will then be changed in our system and a confirmation will be emailed to you when this has been done.

Please do not call the helpdesk with changes of address as these can only be processed by email.

Age Group Prizes

Although the focus of the event is on having fun, prizes will be awarded to first, second and third-placed swimmers in each age category. Prizes will be sent out post-event.