How to Enter

Online Entry

Entering Swim Serpentine

Online entry for all events at the 2018 edition of Swim Serpentine will open on Thursday 22 March. To receive notification of when entries are open, please register your interest below.

Half-Mile Swim

This distance is an ideal entry level open water swim. Taking in half a lap of the Serpentine, there is plenty of time to swim this distance at your leisure with a friend, race your mum or dad or just to try out an open water swimming event with an achievable but for some still challenging swim.

Entry costs £25. Entrants must be at least 12 years old on Saturday 22 September 2018.

One-Mile Swim

A one-mile swim is a classic distance in the world of open water swimming events. Swim Serpentine takes place on the same course as the London 2012 Marathon Swimming Olympic event, with one full lap around the Serpentine making up the one-mile swim. This is the most popular of all the swim distances for Swim Serpentine with swimmers taking anything from 20 minutes through to one hour to complete the swim.

Entry costs £39. Entrants must be at least 16 years old on Saturday 22 September 2018.

Two-Mile Swim

For those who would like to test themselves with two full (1.6km) laps of the Serpentine. Aimed at more experienced swimmers who have already completed a mile open water swim previously. A challenging two-lap swim set in a beautiful location: what’s not to like?

Entry costs £49. Entrants must be at least 16 years old on Saturday 22 September 2018.

The London Classics

London Marathon Events have brought together the best marathon in the world, the world’s greatest cycling festival and the inspirational open water swimming event, Swim Serpentine, to create the London Classics, one of the world’s great sporting challenges.

The unique challenge requires participants to run the Virgin Money London Marathon, cycle 100 miles in the Prudential RideLondon-Surrey 100 and swim two miles at Swim Serpentine, the open water swimming festival.

Visit our London Classics page for more information.

Swimmers with Disabilities

Swimmers with a disability are welcome to enter any of the events. If support or help on the day is needed, please contact

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.

Choosing your wave

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

If you enter Swim Serpentine, you will be able 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 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.