How to Enter

Online Entry

Find out how to be a part of the greatest open water swimming festival on Saturday 26 September 2020 below.

Half-Mile Swim

The half-mile swim is an ideal introduction to open water swimming. Taking in half a lap of the Serpentine, there is plenty of time to swim this distance at your leisure with friends and family.

Entries for the half-mile swim are now open. Enter via the button below.

Entry costs £25. Entrants must be at least 12 years old on Saturday 26 September 2020.

One-Mile Swim

The one-mile swim is a classic open water distance and swimmers will complete one full lap of the Serpentine course.

Entries for the one-mile swim are now open. Enter via the button below.

Entry costs £42. Entrants must be at least 16 years old on Saturday 26 September 2020.

The two-mile distance is now sold out but charity places are available, or you can sign up to the Club La Santa training camp by the end of March and get a guaranteed entry to the two-mile swim.

The two-mile swim is the perfect challenge for swimmers who want to take on a two-lap swim set in a beautiful location.

Entry costs £57. Entrants must be at least 16 years old on Saturday 26 September 2020.

Children with Cancer UK Swim Serpentine Super Six

The Super Six challenge at Children with Cancer UK Swim Serpentine is now sold out.

The Super Six offers participants the chance to swim six miles at the event, swimming in a combination of different waves throughout the day.

Entry costs £150. Entrants must be at least 18 years old on Saturday 26 September 2020.

Swim for charity

If you're taking part in Children with Cancer UK Swim Serpentine, why not use your place in the swim to raise money for charity? Check out a list of charities that have places and, once you have secured a place in the event, you can set up a fundraising page with Virgin Money Giving – it takes minutes and will make sure your charity receives even more of the money you raise.

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 London Marathon, cycle 100 miles in the Prudential RideLondon-Surrey 100 and swim two miles at Swim Serpentine.

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 disability@londonmarathonevents.co.uk

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 Children with Cancer UK Swim Serpentine events.

Choosing your wave

The Children with Cancer UK Swim Serpentine events will comprise a number of waves (groups).

If you enter Children with Cancer UK 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 have a general entry, secured your place via a charity or any other type of guaranteed entry, please email changeofaddress@londonmarathonevents.co.uk with your full name, date of birth and confirmation of what details are changing. Our Helpdesk team will then confirm once the change has been made.

Age Group Prizes

Children with Cancer UK Swim Serpentine is not a competitive event, with the main focus on participation. However, the final wave of the day – the two-mile wave at 16:30 – is classed as a ‘fast wave’ with a qualifying time of 41 minutes per mile. This is the only wave (apart from the junior swimmers in the half-mile wave) where we will be awarding age group medals to the top three male and female finishers in the following categories:

Two-mile Swim: 18-24 year olds, then in five year age bands up to 80+.

The Half-mile Swim is also a fun event, but the top three boy and girl finishers in the 12-14 and 15-17 age categories, who are unable to enter longer events, will also be awarded medals.