
Get 25% off your registration!
As The Royal Marsden Cancer Charity are an Associate Partner on the 2025 Ultra Challenge series, you’ll get a 25% discount on the ‘Full Sponsorship’ registration fee when signing up to fundraise for us!
Push yourself further with six great spring events to choose from in 2025!
Walk, jog or run at your own pace on the Ultra Challenge Series event of your choice. With 10km, 25km, 50km,75km and even 100km challenge options available, there’s a challenge for everyone! You can join either as an individual or as a team of friends or family – the more the merrier.
On this page:
How to take part
Registration
Sign up via Action Challenge and make sure to choose to take on your challenge in support of The Royal Marsden Cancer Charity. Registration fees and minimum fundraising targets depend on the event, distance and funding option you choose.
Fundraising
You will have a dedicated member of The Royal Marsden Cancer Charity team on hand to help you with advice and tips for fundraising. We will be there for you every step of the way!
Get ready for your trip!
Our partners at Action Challenge will provide everything you need to help you get ready for your trek, including training plans and discounts for any new gear you might need to purchase.
Take on the challenge of a lifetime for The Royal Marsden Cancer Charity
Join us for your unforgettable adventure knowing you've raised vital funds that will transform the lives of cancer patients around the world.

Payment options
Each event offers three funding options so you can make sure the challenge is right for you:
- Full sponsorship for charity – You'll pay a small registration fee and have a minimum fundraising target. We will pay for your event place.
- Mixed funding for charity – You'll pay for half your place and have a smaller minimum fundraising target. We will pay for the other half of your event place.
- Own place charity fundraising – You'll pay for your whole place so you won’t have a minimum fundraising target, we will just ask you to raise as much as you can.

Bath 50 Challenge
Date: 29 March 2025 | Location: Bath |
Event type: Walk, Jog, Run | Distance: 10, 29, 50km |
Fundraising target: £100-375 | Registration: £20-40 |
(Get 25% off your registration for the Full Charity Sponsorship option!)
Taking place in the elegant historic city of Bath, with fantastic panoramic views of the city and surrounding countryside, this is the perfect opportunity to kick off the event season and challenge yourself this spring. Sign up to the Bath 50 Challenge today!

Easter 50 Challenge
Date: 12 April 2025 | Location: Windsor/Thames Path |
Event type: Walk, Jog, Run | Distance: 10, 25, 50km |
Fundraising target: £100-375 | Registration: £20-40 |
(Get 25% off your registration for the Full Charity Sponsorship option!)
With 50km, 25km and a new 10km option, this event is the perfect way to make your Easter an active one. Walk, jog, or run from Windsor Racecourse; whichever distance you choose, it’ll be a great way to spend your Saturday! Find out more and sign up for the Easter 50 Challenge today.

Isle of Wight Ultra Challenge
Date: 13-4 May 2025 | Location: Isle of Wight |
Event type: Walk, Jog, Run | Distance: 10, 29, 54, 106km |
Fundraising target: £100-575 | Registration: £20-50 |
(Get 25% off your registration for the Full Charity Sponsorship option!)
Trek along the spectacular southern cliffs, past the iconic Needles and up to historic Cowes at the halfway stop. For Full Island challengers, it's on to the cliffs of Ventnor, and back to the welcome Base Camp in Chale after an epic 106km journey. Sign up for the Isle of Wight Ultra Challenge today to make 2025 a year to remember.

Jurassic Coast Ultra Challenge
Date: 17-18 May 2025 | Location: Dorset |
Event type: Walk, Jog, Run | Distance: 25, 50, 75, 100km |
Fundraising target: £100-575 | Registration: £20-50 |
(Get 25% off your registration for the Full Charity Sponsorship option!)
Walk, jog or run a distance of your choice, along the spectacular Jurassic Coast - a World Heritage Site. With full support all the way, you can push yourself further against a backdrop of wonderful coastal scenery and enjoy a great weekend away. Find out more and sign up for the Jurassic Coast Ultra Challenge!

London to Brighton Ultra Challenge
Date: 24-25 May 2025 | Location: Dorset |
Event type: Walk, Jog, Run | Distance: 25, 33, 42, 58, 75, 100km |
Fundraising target: £275-575 | Registration: £30-50 |
(Get 25% off your registration for the Full Charity Sponsorship option!)
The ‘original Ultra Challenge’ – join over 2,000 adventurers to take on the capital to coast route. The full 100 km route heads over the South Downs before the welcome sight of the Brighton coastline comes into view. With multiple distance options available, there’s a challenge for everyone, so why wait? Sign up for the London to Brighton Ultra Challenge today!

Lake District Ultra Challenge
Date: 7-8 June 2025 | Location: Lake District |
Event type: Walk, Jog, Run | Distance: 10, 25, 50, 100km |
Fundraising target: £100-575 | Registration: £20-50 |
(Get 25% off your registration for the Full Charity Sponsorship option!)
Join the Lake District Challenge and take on England's finest countryside at your pace. With stunning views en-route, you’ll take on tough hills, the Garburn Pass and a halfway point by the iconic Lake Windermere. Find out more and sign up for the Lake District Ultra Challenge today!

What’s included when I join Team Marsden?
Your registration includes:
- Your very own Royal Marsden Cancer Charity top to wear on the day - perfect to help raise awareness!
- One-to-one support from a dedicated member of the Charity team.
- Training support and guides full of top tips to help you make the most of your challenge via the Ultra Challenge app.
- Access to our fun, friendly, and supportive online community in the Team Marsden Challenge Events Facebook group