London Winter Run 2025 Start Time. Fill in the form below to. The first weekend of the challenge is set to begin on january 4th 2025 but with six rewards on offer and eight weekends to unlock them all you can start at any time!

Right now, our london winter run supporters are getting ready to run 10k through the streets of london to raise vital funds for research into preventing, diagnosing, and treating cancer. The cancer research uk’ london winter run is a ten kilometre challenge through the heart of the capital.