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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 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!
• Walk, Jog, or Run • 50km, 25km, 10km Options • Food & Drink • Medal & T Shirt
