North Downs 50 Challenge

12 July 2025

Several people in trekking gear, walking up a hill in bright sunlight.

Trek 50km and take in some of the best of the Surrey Hills and the North Downs Way while fundraising to make a difference to staff, patients, families and researchers across the Royal Free London NHS Foundation Trust.

This looped route sets off from the Guildford basecamp and takes in wonderful views of the Surrey hills, the North Downs Way, and the surrounding countryside and back to the Guildford basecamp.

As part of our team, you’ll receive one of our charity t‑shirts, fundraising tips and tricks, training tips, and our dedicated events team to support you with every step! You’ll get full support and hospitality along the route too:

Meals and food included
Regular rest stops
Medics, massage teams and pace walkers
Medal, t‑shirt and a glass of fizz
Join as a team or individual

With a 25km option also available, there is a North Downs Challenge ready for you!

Find the full route on the official Ultra Challenge website.

Choose your fundraising option for the 25k route

Charity sponsorship

£20 registration fee + £240 fundraising target
Pay a small registration fee and do lots of fundraising.

Mixed funding 

£50 registration fee + £150 fundraising target
Pay a higher contribution to the cost of your place and fundraise to a smaller target.