North Downs 50 Ultra Challenge

North Downs 50 Ultra Challenge : Guildford basecamp

The North Downs 50 takes place on Sat 1 Aug 2026 from a Guildford basecamp with start and finish at Loseley Park. The main route is a looped 50 km course on the North Downs Way and Surrey hills, offering varied countryside and views to the south. Shorter route options follow parts of the same network of trails.

Distances offered:

• 50 km - Guildford basecamp loop, Loseley Park start/finish, ~830 m elevation
• 25 km - Guildford basecamp loop, Loseley Park start/finish, ~530 m elevation
• 24 km - first half of 50 km to Milton Court near Dorking, ~600 m elevation
• 10 km - Guildford basecamp loop, Loseley Park start/finish, ~230 m elevation

The event provides regular covered rest stops roughly every 12.5 km, with meal stops at about every 25 km. Stops supply hot drinks, water, energy drinks and snacks; major rest stops include medical, changing and baggage facilities. A team of medics, podiatrists and masseurs supports participants along the route.

The course is fully signed with pink arrows and night glow-sticks, and the organiser uses a timing system that scans at rest stops. An event app offers GPS tracking and route maps. Event extras include camping, shuttle buses and transfers, parking, a Solo Start option, an Ultra March category for target-paced walkers and a Trailblazerz category for faster competitive runners. Finishers receive a medal, a t-shirt, a finishers meal, a photo and a glass of fizz. Visit the organization's website for the most recent information.