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A Cancer Research UK marathon runner.

Find your next challenge

We have places in some of the UK's best running and challenge events. Fundraising from these events helps raise vital funds for our life-saving work.

Inspire me

London Winter Walk.

London Winter Walk

A great event to kick start your New Year! Pick from a range of distances, all starting & finishing at The Oval Cricket Ground.

Smiling woman running in a half marathon for Cancer Research UK, with supporters cheering in the background.

2026 Cancer Research UK London Winter Run

Join a 10k challenge through the heart of the city, passing world famous landmarks, and instantly recognisable areas that have been given a winter spin.

Marathon participant smiling and ready to high-five.

2026 Cambridge Half Marathon

The one lap half marathon route will take you on a whistle stop tour of the city and show you everything that the spectacular city of Cambridge has to offer.

People running the Isle of Wight Ultra Challenge.

2026 Bath 50 Ultra Challenge

Centred on this elegant historic city, take on a 50 km Ultra, a testing 29 km, or a sharp 10 km challenge at your pace. Enjoy fantastic panoramic views!

Easter-50-Ultra-Challenge.

Windsor 50 Ultra Challenge

Walk, jog or run a looped route 50 km, 25 km, or 10 km through historic Windsor, along the Thames Path, and enjoy some wonderful surrounding countryside.

Interested in other sports?

Woman covered in mud leaving a mud puddle and smiling during the CRUK Tough Mudder event.

Tough Mudder series

Take on a Tough Mudder for Cancer Research UK. All Tough Mudder events will be 10+ miles with over 20 Obstacles to complete on the day so challenge yourself in the ultimate obstacle course, designed to push you to your limits.

Join Team Cancer Research UK

Already have a place in an event? We’d love to have you fundraising for #TeamCRUK! Get your fundraising pack today.

Learn how to join