The challenge

A 50km looped challenge in some of the Chilterns finest countryside, with historic trails, rolling hills, nature reserves, with fantastic views. Join up to 2,000 adventurers andtake it on at your paceas a walk, jog, or run -and fundraise for your favourite charity! Abasecamp 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! 

The route

Distance options

• Full Challenge (50km) - Henley loop
• Half Challenge (25km) - Henley loop (but shorter!)
• 10km looped route from the basecamp at Henley Showground.  The route explores public footpaths  & wonderful woodlands within the Culden Faw estate.

Fundraising

You only need to raise half of the fundraising target 3 weeks ahead of the Chiltern 50 Challenge to confirm your place - you can then top up the rest during, and after, the challenge!

Charity sponsorship - pay a small registration fee and do lots of fundraising!
Remember you only need to raise half of the fundraising target to confirm your place.

Full Challenge (50km) - £40 registration fee + £375 in fundraising

Half Challenge (25km) - £30 registration fee + £275 in fundraising

10km Challenge - £20 registration fee + £100 in fundraising

Mixed Funding - pay a higher contribution to the cost of your place and fundraise less. 

Full Challenge (50km) - £75 registration fee + £225 in fundraising

Half Challenge (25km) - £50 registration fee + £150 in fundraising

10km Challenge - £22.50 registration fee + £70 in fundraising

Don't worry, we're on hand to help you reach your goal, with lots of fundraising materials at the ready! Please get in touch for a chat if you have any questions, we're always happy to hear from you. 

FAQs

For further information about the challenge, its inclusions, the route and FAQs, please visit the official organiser's website or email [email protected].

If you have any fundraising questions, you can get in touch with a member of the Events team by getting in touch on the contacts below, and we will be delighted to help.