July 12, 2025
North Downs 50 Ultra Challenge 2025
Choose your distance, and walk, jog or run the full looped 50km route, a 25km half challenge, or even the Guildford 10km. Take in some of the best of the Surrey hills, the North Downs Way, and the surrounding countryside. A route with real variety and some wonderful scenery & views.

- Guilford
- July 12, 2025
- 020 7430 7788
- [email protected]
Help to fund lifesaving research
Every step helps fund research into childhood cancers, creating better treatments and brighter futures.
Support for families
in crisis
Your run provides emotional and practical support support for families families facing the challenges of a cancer diagnosis.
Become a champion
for change
You’ll raise awareness and vital funds, helping to ensure no child faces cancer without hope for a brighter future.
What to expect
By joining the North Downs 50 Ultra Challenge team, you will receive the following support from us:
- A Fundraising Pack containing lots of fundraising advice
- Regular emails to provide top tips and information
- Your own Team Children with Cancer UK running vest
- A friendly team on hand to support you
If there are any other events you would like to take part in the Ultra Challenge series and support Children with Cancer UK, you can read about the events and sign up straight away here.

Join with your own place
To find out more about the fundraising requirements and to join our team, please click on the button below. If you are having any issues or have any questions at all, please email us at [email protected] or phone us on 020 74307788.
Where your money goes
Every contribution is carefully allocated to fund critical research, provide essential resources to families, and drive greater awareness.
HOW WE USE
EVERY
£1
Fighting childhood cancer | |
---|---|
Research | 44p |
Supporting Families | 15p |
Raising Awareness | 21p |
Funds to support our cause | |
---|---|
Fundraising | 20p |
Cancer diagnoses
Every day, around 10 children and young people in the UK are diagnosed with cancer.
New treatments
8 out of 10 young cancer patients can now receive successful treatment, thanks to the specialist research we help fund.
Safer therapies
We are committed to developing safer and more effective childhood cancer treatments with fewer toxic side effects.
Funding research
We invest in crucial childhood cancer research that would otherwise go unfunded.