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After unprecedented demand, the 2025 Cancer Research UK London Winter Run on Sunday 23 February is now at full capacity, with 25,000 people set to take on our annual winter 10k. No further places will be released.
In summer 2025, the team behind this smash-hit event are introducing a new 10k, called LDNX. It’s set to be just as memorable, with innovative features, a glorious medal, and stunning live performances at a new location in the capital.
Leave your details here to be the first to hear about the 2026 edition of the Cancer Research UK London Winter Run, and/or choose to get an exclusive opportunity to run our new 10k LDNX this summer at a very special launch price.
The deadline to update your details was Tuesday 14th January. We're currently updating our system, so access to your account is temporarily unavailable. We’ll notify all participants by email once the process is complete, and you’ll be able to log in to view your registration details. We expect this to be ready by Monday 3rd February.
IMPORTANT – This does not impact your Fundraising Login, which can still be accessed here.
We publish all emails sent to participants on this page and if you have unsubscribed, you can resubscribe there too.
Please find the road closure information here. If you have any vehicle access queries please email roadclosures@winterrunseries.co.uk.
I'm afraid that there aren't any options available if you are no longer able to take part. All participants had the opportunity to purchase booking protection at the point of entering and we had the opportunity to defer but the deadline to do this was 22nd December. I'm afraid it isn't possible to offer a refund, deferral or transfer and if you are certain you aren't taking part and would like us to stop emailing you, please contact us using the email address below.
If you did purchase booking protection as part of your registration, you can claim it from our insurance providers Active via this page.
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If you have checked out the above and still need help, simply email info@winterrunseries.co.uk and we’ll aim to get back to you within three working days.