Places in the 2025 Cancer Research UK London Winter Run are now sold out. 

After unprecedented demand, the 2025 Cancer Research UK London Winter Run is now at full capacity, as an incredible 25,000 people gear up to conquer the cold at the 10th anniversary edition on Sunday 23rd February.  

No additional places will be made available for 2025, allowing the Cancer Research UK London Winter Run team to concentrate on providing an exceptional experience for participants. 

But the excitement doesn’t stop there! Coming this summer, the team behind the Cancer Research UK London Winter Run are introducing a new 10k, called LDNX. Promising to be as unforgettable as its winter counterpart, LDNX will include innovative features, a glorious medal, and show-stopping live performances at an exciting new location in the capital. 

Leave your details below to be the first to hear about the 2026 edition of the Cancer Research UK London Winter Run and/or choose to secure an exclusive opportunity to join LDNX this summer at a very special launch price.

Alternatively, if you are still looking for ways to get involved in the 10th anniversary edition on Sunday 23rd February 2025, we are always on the lookout for people to join our incredible team of volunteers, all of which make the Cancer Research UK London Winter Run possible. You can find out more about how to get involved here.