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North Downs 50 Ultra Challenge 

Tackle the rolling hills of the North Downs and step up for #TeamKidney! 

Walk, jog or run all over kidney disease!

Take on a fabulous 50 km loop through the scenic Surrey Hills and surrounding countryside, starting from Guildford, and raise vital funds for Kidney Research UK. 

This route combines rolling hills, historic trails, and stunning views to the south, making it a perfect summer challenge for walkers, joggers, and runners of all abilities. Easily accessible from London, it is ideal for anyone looking for a countryside escape with plenty of variety and breathtaking scenery. 

Full support is provided along the route, with rest stops, plenty of food and drink, and a celebration finish featuring a medal and t shirt. With 25km and 10km options also available, there is a North Downs challenge for everyone. 

Step out with #TeamKidney and make every kilometre count towards life-saving kidney research 

Surrey

1 August 2026

Distances: 50km, 25km, 10km

Reg fee: £20-£40

Minimum sponsorship: £100-£375

As part of #TeamKidney you'll receive...

Tshirt and free fundraising pack

A Kidney Research UK technical t-shirt

A fundraising pack full of tips and ideas

Support from our dedicated team every step of the way

Regular updates to inspire you with training and fundraising

Other useful stuff

Image FR pack

Fundraising

Get all the materials and resources you need for your fundraiser.

London Bridges Walk walkers

Dress to impress

Get extra merchandise and show everyone you're on #TeamKidney.

A runner finishing an event wearing the Kidney Research UK running top

Got your own place?

Tell us about your event and we'll support you all the way.

London Bridges Walk walkers

Fundraise online

Get your fundraising off to a flying start with your own JustGiving page.

Frequently asked questions

Got a question? Get in touch

If you have a question or would like to chat about one of our events, the team here at Kidney Research UK are happy to help. Please get in touch.

0300 303 1100

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