Jog 40 miles in January

Thank you to everyone who took part in our 2025 Jog 40 miles in January challenge! You have all been incredible and have helped us to raise vital funds for The Royal Marsden Cancer Charity.

A woman in running gear standing in front of a view across the River Thames and city of London
Date
TBC 2026
Location
Anywhere
Event type
Run / Marathon
Distance
40 miles
FREE to sign up!

What is the Jog 40 miles in January challenge? 

It's simple, really! Help us raise vital funds to support world-class cancer research by completing 40 miles in the month of January – you can jog, walk or wheel! 

If you're interested, keep an eye out for updates on the 2026 challenge. 

purple illustrated microscope icon

Every mile makes a difference.

Since 2021 our amazing Jog 40 miles in January participants have raised over £1.5m for groundbreaking cancer research at The Royal Marsden.

The Royal Marsden is leading the way in cancer research, with over 800 clinical trials, involving thousands of patients from across the UK. Your fundraising will ensure we can continue to support this pioneering research and help transform the lives of cancer patients.

Share this challenge with your friends and family and take part together to raise vital funds for cancer research. 

Team Marsden gallery

Jog 40 January runner, Asma. She is standing on a bridge overlooking a river, smiling and holding a Jog 40 Challenge medal around her neck.
A selfie of a woman in a black headband and orange Royal Marsden Cancer Charity. She is running in a grassy field with frost covering it.
A smiling woman in an orange charity t-shirt and running leggings standing outside.
A woman in running gear standing in front of a view across the River Thames and city of London
Jog 40 in January runner Claire. She is smiling and jogging through a residential street, wearing a bright orange Royal Marsden Cancer Charity t-shirt
Jog 40 January runner, Katrina. She is smiling with her Royal Marsden Cancer Charity t-shirt on, while standing on a walking trail in a park.
Middle age woman wearing a Green Royal Marsden shirt and smiling. She is outside

Contact us

If you have any questions about the challenge, please contact us at [email protected]

Contact us