Official challenge partner for 2025
Join us and be part of the biggest 'Team Marsden' we’ve ever had in this event, while raising vital funds for The Royal Marsden Cancer Charity. As we are an official partner on this event, you get a 50% discount on the ‘Full Sponsorship’ registration fee when signing up to support us.
Take on the Thames Path Ultra at your own pace!
The Thames Path Ultra Challenge invites you to walk, jog or run a distance of your choice, against the fantastic backdrop of England’s greatest river.
With 75km, 50km, 25km and 10km challenge options also available – there’s a challenge for everyone – and you can join as an individual or as a team of friends or family.
On this page:
How to take part
Register
Whether you sign up by yourself or with a group, pick your distance and choose the ‘Full Charity Sponsorship’ to get your 50% off registration fee.
For full details of prices, check out the Thames Path Ultra webpage which explains each option available to you for this challenge.
Fundraise
You will have a dedicated member of The Royal Marsden Cancer Charity team on hand to help you with advice and tips on fundraising. We will be there for you every step of the way!
Get ready for the day
Our partners at Action Challenge will provide everything you need to help you get ready for your challenge including training plans, an event app and access to their 70,000-strong Ultra Challenge Facebook community.
Take on the path for The Royal Marsden!
Join us in 2025 and take on the Thames Path Ultra challenge!
The Thames Path Route
Whether you take on the full 100km route, or a shorter challenge, join Team Marsden to discover the beauty of the England's greatest river while raising vital funds for ground-breaking cancer research. See the route map here.
- Start in South West London at leafy Bishops Park
- Follow the bends of the River Thames through Richmond and towards Deer Park
- Pass the magnificent sights of Hampton Court Palace
- Continue on to the meandering waterways of Runnymede
- Head north towards Windsor Castle and Cookham
- Finish your trek at Henley-on-Thames, famed for its regatta, with a well-earned hot meal and celebration
Still have questions? For more information, visit the Thames Path Ultra website.
What's included when I join Team Marsden?
Team Marsden gallery
