Take on a challenge

Get involved, challenge yourself, have fun and help us raise funds

Join us to take on a challenge and enjoy an adventure, while raising money.

We have places for a variety of different challenges but if there is something else you would like to take part in, please get in touch.

The Big Half

Sunday 1st September | 13.1 miles | London

Organised by London Marathon Events, The Big Half is a vibrant, inclusive half marathon with a fun, festival atmosphere. The 13.1 mile course weaves through London from Tower Bridge to the iconic Cutty Sark in Greenwich.

The route passes through the four London boroughs of Tower Hamlets, Southwark, Lewisham and Greenwich – taking in Canary Wharf, Wapping, Tower Bridge, Rotherhithe and Deptford along the way – before finishing at the iconic sailing ship.


Places cost just £30 – we ask that you raise a minimum of £350 in sponsorship.

If you are interested in running for us next year or taking on a different challenge event then please get in touch: erussell@ldnlondon.org

Swim Serpentine

14th September 2024 | Hyde Park

Swim Serpentine is a swimming event that takes place in the world-famous Serpentine lake in London’s Hyde Park.

There are four distance options to choose from, making this the perfect event for an enjoyable and memorable open water swim.

“Swim Serpentine is amazing because you are out in the open and you are racing against yourself. You’re not even really racing! You’re just out in mother nature, trying to take in some of the views. There’s so much more enjoyment in that than a race.” (2023 event participant)

Places cost £25 and we ask you to raise a minimum of £250

If you are interested in taking on this event or another swim challenge to raise funds for LDN London then please register your interest below.

Register Interest Here 

Brighton Marathon 2025

Sunday April 2025 | 26.2 Miles | Brighton

This incredible festival of running, held in the iconic seaside city, includes the flagship Brighton Marathon, held on a stunning 26.2-mile course that starts in the heart of the city and finishes in style on Brighton’s world-famous seafront.

Enjoy an atmosphere like no other in this bustling, vibrant and colourful city, which welcomes thousands of spectators and the local community each year.

This is an event for everyone, with something for all ages and abilities. Come and be a part of it. Participants enjoy a course that starts in Preston Park at 09:45, snakes its way through Brighton city centre, along the glorious seafront and finishes at Hove Lawns.

This is a marathon like no other – don’t miss out on this lifetime experience.

Sign up here

Royal Parks Half Marathon 2025

Sunday October 2025 | 13.1 miles | Hyde Park

We have sold out of places for 2024 but you can register your interest to take part in the event in 2025 to raise funds for LDN London

This stunning central London run takes in some of the capital’s world-famous landmarks on closed roads, and through four of London’s eight Royal Parks – Hyde Park, The Green Park, St James’s Park and Kensington Gardens.

Places cost just £30 – we ask that you raise a minimum of £350 in sponsorship.

Sign up Form

We would love to hear from you

If you are taking on your own challenge, why not do it for LDN London? Or if you are interested in taking part in another challenge not listed and want to discuss it, please get in touch. We’d love to talk fundraising with you.

Emma Russell, Marketing and Fundraising Manager – erussell@ldnlondon.org