Charity place
Register today to join our team, and we'll help you reach your target in no time. Support Breast Cancer Now under the ‘Charity Sponsorship’ payment option and a concessionary price of 50% off will automatically be applied.
Own place
If you already have a place to take part in the Chiltern Ultra Challenge, we'd love to welcome you to our team!
About the event
This ‘end of season’ 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 & finishing at our Base Camp in Henley-on-Thames, there's a Saturday night celebration BBQ & entertainment with camping options.
Passing through nature reserves, forests, and a few hills with great views - it's a route with real variety, and some wonderful scenery - and it's all easily accessible from London. With 25km options also - there's a Chiltern Challenge here for everyone!
Walk it, jog it, or run it!
Push yourself further and help us to support anyone affected by breast cancer.

How we'll support you
You’ll get full support and hospitality all the way, leaving you to focus on your challenge!
- Free Breast Cancer Now walking t-shirt
- Fully signed route
- Regular rest stops with free food and drink
- Medics, marshals, massage
- Finishers medal & glass of fizz
- Shuttle buses and transfers
- Plus plenty of fundraising & training support

Any questions?
For more information on the challenge, its inclusions, the route, FAQ’s and much more – please visit the Chiltern 50 Challenge website.
If you have any event related questions, please email the Action Challenge team on chiltern@ultrachallenge.com or call them on 020 7609 6695.