Chiltern 50 Ultra Challenge 2026
Walk, jog or run some of the best of the Chilterns beautiful countryside and historic trails. Join Team Macmillan for 50% off, and together we will go the extra mile to support almost 3.5 million people living with cancer in the UK
About this event
This 50km looped route covers some of the best of the Chilterns countryside.
You can walk, jog or run along historic trails and over rolling hills. Starting and finishing at a base camp in Henley Showground, there's a Saturday night celebration BBQ and entertainment with camping options.
Passing through nature reserves, forests and a few hill with great views. It's a route with real variety, and some wonderful scenery, and it's all easily accessible from London.
Whether you join as an individual or with a team, choose from 100km, 75k, 50km, 25km or 10km distance options, and either walk, jog or run for people living with cancer.
As Macmillan are an Official Charity Partner, you'll also receive a further 50% OFF Charity Fundraising Places with Team Macmillan. Head to the Macmillan Ultra Challenge Page to find out more and sign up.
How to enter the Chiltern Ultra Challenge
All distance options have Charity, Mixed Funding or Self Fund options.
Charity fundraising
Mixed fundraising
Self funded place
Great achievements lie beyond comfort levels – join Team Macmillan
Why should I join?
You’ll get full support and hospitality on the way, leaving you to focus on your challenge:
• Join as an individual or team
• Multiple distance options
• Camping packages available
• Take on the challenge at your own pace
• Fully supported and signed route event
• Food and drink provided
• Medical and welfare tents along the course
• Access to an exclusive Ultra Challenge event app
• Finisher’s medal, t-shirt, and glass of fizz - plus other goodies available!
How we'll support you
But most importantly...
We'll provide you with a reason to keep going because you'll know that you're helping improve the lives of people living with cancer.
Donations make up 98% of our annual income so we simply couldn't do what we do without you.
More about this event
For full information on this challenge, please visit the Macmillan Cancer Support Ultra page. You can also find the FAQs here or contact the Action Challenge event organisers directly.
Please make sure you have read our Terms and Conditions before signing up.
Ready to join?
By joining us you'll know that you're helping improve the lives of people living with cancer in the UK today.
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