Chiltern 50 Ultra Challenge

Take on the Chiltern 50 Ultra Challenge and enjoy a stunning route through some of England’s finest countryside. Join over 1,000 Challengers taking on the distance as a walk, jog, or run.

Set out from basecamp in Henly and head north along historic trails and across rolling hills with fantastic views. You’ll travel on Shakespeare’s Way, the Chiltern Way, and the Icknield Way and through nature reserves known for deer and other classic English wildlife. Easily accessible from London, this is the perfect scenic day out on the trails for Challengers of all abilities.

How to enter

There are 2 entry options for the Chiltern 50 Ultra Challenge.

Charity funding

Pay a small registration fee and commit to a fundraising target. BHF will cover the cost of your event. As BHF is an official Ultra Challenge Series partner, we're offering Charity Funded places for just £10 (excluding 10km and 10-mile challenges) until 30 November 2026. Use the code BHFDEAL10 at checkout to claim your discounted place.

10km distance 

• £15 registration fee

• £150 fundraising target

25km distance

• £30 registration fee

• £275 fundraising target

50km distance

• £40 registration fee
• £375 fundraising target

Self funding

As a Self Funder you'll pay the full cost of the event place. And you can fundraise however much you'd like.

10km distance 

• £55 registration fee

 

25km distance

• £89 registration fee

50km distance

• £139 registration fee

To take part, you must raise the minimum sponsorship for your distance. We require half of your fundraising target 4 weeks before the challenge to secure your place. 

Please note these events are organised by Ultra Challenge. Participants raising funds for British Heart Foundation will be joined by others, raising money for different charities. Find out more on the Ultra Challenge website.