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Photo of people walking under trees on a forest route

The Chiltern 50 is a looped challenge in some of the Chilterns finest countryside, with historic trails, rolling hills, nature reserves, and fantastic views.

At the 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.

All levels of experience are welcome - you can walk, run or jog!

Choose your fundraising option

Full Charity Sponsorship - 25% discount off reg fee is applied for this option!

*Extended NY deal* Get a further 50% discount on your reg fee below until 29 February 2024 using the coupon code: CHARITY50%

  • Full Challenge (50km) - £22.50 registration fee and £360 sponsorship target
  • Half Challenge (25km) - £15 registration fee and £240 sponsorship target
  • 10km Challenge - £7.50 registration fee and £100 sponsorship target

Mixed Funding - you pay half of your event place cost, and fundraise a smaller minimum target

*Extended NY deal* Get £10 off your reg fee below until 29 February 2024 using the coupon code: DISCOUNT10

  • Full Challenge (50km) - £75 registration fee and £225 sponsorship target
  • Half Challenge (25km) - £50 registration fee and £150 sponsorship target
  • 10km Challenge - £22.50 registration fee and £70 sponsorship target

Own place funding option also available

If you have any questions, please get in touch with the Anthony Nolan Events Team on 0303 303 3000 or

What to expect

Your entry into the event includes: 

  • rest stops with free food, drink, and massages
  • a medal, t-shirt, and glass of fizz to celebrate your achievement
  • support from medics and marshals along the way

You'll receive support and hospitality from the event organisers Action Challenge every step of the way.

How we'll support you

Alongside the support and hospitality from Action Challenge, we'll also be here to support you by providing:

Your very own Anthony Nolan T-shirt or running vest


Training tips and tricks to get you ready for the big day

Chiltern challenge_large

Dedicated fundraising support from the Events team to help you smash your fundraising goals