Chiltern 50 Ultra Challenge

Your challenge your way.

Choose from 50km, 25km loops and 10k option.

End of season 50 km looped challenge in some of the Chilterns finest countryside, with historic trails, rolling hills, nature reserves, and fantastic views. At our basecamp in Henley, there’s a Saturday night celebration BBQ, bar & entertainment, with extensive on-site camping & parking options. A route with real variety and some wonderful scenery – and easily accessible from London. You’ll get full support & hospitality, and with 25 km loop option and a 10K loop also available, there’s a Chiltern Ultra Challenge® for everyone!

 Click here to head to the Ultra Challenge page to find out full details of funding options and to sign up.

What to expect:

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Cost and fundraising options:

Option A - Full Charity Sponsorship 

You pay a small registration fee, do lots of fundraising and we cover the cost of your event place!

Option B - Mixed Funding 

Pay half of the event place cost yourself, fundraise a bit less and we pay the balance of the event place cost.

Option C - Self Fund 

You pay the full cost of the event place - fundraise whatever you want, with no set target or deadline, and there’s no cost at all to the charity!

Secure your charity place with #TeamCardio:

We'd love for you to join our team for the Chiltern 50 Ultra Challenge 2025!

Sign up today

Join #TeamCardio with your own place:

If you have your own place for the Chiltern 50 Ultra Challenge you can still be part of #TeamCardio and support people living with cardiomyopathy. Click below to complete a registration form and you'll receive all of our #TeamCardio support and tips leading up to the big day. With your own place there's no minimum fundraising target, simply raise as much as you can.

I have my own place