North Downs 50 Ultra Challenge®

The North Downs provides a fabulous challenge from a Guildford basecamp, with a looped 50km route which takes in some of the best of the Surrey hills and the surrounding countryside. A route with some wonderful scenery & fabulous views out to the south, and easily accessible from London!

You can take it on at your pace as a walk, jog, or run – and fundraise to help support our life-saving work.

Sign up as an individual or as a team - you’ll get full support all the way, plenty of food and drink, optional camping and transfers, a special medal, t-shirt and celebration finish. With 25km and 10km options also available – there’s a summer challenge here for everyone. Push yourself further in 2026, take on an Ultra Challenge – the UK’s No.1 Series of treks and trail challenges!