Chiltern 50 Challenge

A 50km looped challenge in some of the Chilterns finest countryside, with historic trails, rolling hills, naturereserves, with fantastic views. Join up to 2,000 adventurers and take it on at your pace as a walk, jog, or run - and fundraise for your favourite charity! A basecamp in Henley, and a route with real variety and some wonderful scenery – and easily accessible from London. Sign up as an individual or as a team; you’ll get full support all the way, plenty of food & drink, optional camping & transfers, a special medal, T shirt and celebration finish. With 25km & 10km options also available – there’s a Chilterns Challenge for everyone! Push yourself further in 2026, take on an Ultra Challenge – the UK’s No.1 Series of treks & trail challenges!

Head to the Ultra Challenge website to discover more exciting events and any questions please email [email protected].

This event is organised by Action Challenge.

Chiltern 50 banner

How to take part in the Chiltern 50 Challenge

I need a place

There are few ways to fund the Chiltern 50 Challenge, from full charity sponsorship to own place charity fundraising.

I already have a place

If you already have a place and you'd like to use it to raise money for us, we'd love to have you on the team! There is no minimum target to raise.

How we will support you

What to expect when you become a #KidneyWarrior:

  • 25% off your registration fee
  • Charity technical T-shirt
  • Fundraising pack full of helpful hints and tips
  • Dedicated support from our experienced fundraising team
  • Invitation to our #KidneyWarrior Facebook page
Kidney Care UK running T-shirt and fundraising items including a fundraising guide, sponsorship form and collection tins and boxes.

Get your fundraising started!

Our Fundraising Guide is packed with fundraising ideas, tips and information to help you make your event or challenge a success.

Download your Fundraising Guide

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