Chiltern 50 Ultra Challenge

This 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.

About the event 

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 & 10km options also - there's a Chiltern Challenge for everyone! 

Your entry includes free food and drink at regular rest stops, plus support including medics, marshals and massage. As you cross the finish line, you’ll get a glass of fizz, t-shirt, and a medal to commemorate your achievement.  

As Asthma + Lung UK are an official partner on this event, you get a 50% discount on the ‘Full Sponsorship’ registration fee when signing up to support us. We'll also send you a free A+LUK t-shirt and neck buff when you sign up to this event to support our work. 

Sign up now 

Distance and sponsorship options. 

Full Sponsorship – you pay a small registration fee, do lots of fundraising and we cover the cost of your event place! As we are an official Charity Partner – you get 50% off the standard reg fee 

50km: Reg fee £30 (£15 when you sign up with Asthma + Lung UK) + fundraising target £360 

Shorter distances and lower fundraising targets are also available! 

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

50km: Reg fee £75 + fundraising target £225 

Shorter distances and lower fundraising targets are also available! 

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! 

10km: £39 25km: £89 50km: £139 

Get in touch

If you have questions about the event and want to know more, please do not hesitate to contact our events team at events@asthmaandlung.org.uk.