Why not get in touch with us and tell us how it went?

We'd be more than happy to share your experience with our readers.

Whether you're taking part in your first marathon or you're an experienced runner, or whether raising money for charity or simply taking on a new challenge, we'd love to hear all about it.

To share your experience with us, just visit this link here after the race and tell us all about the event.

We'll want to know why you ran the London Marathon, whether you were running for charity, and how your race went.

We'll also be keen to hear about your race time and, of course, we'd love to see a photograph of you with your medal.

There's also a link to the contributor terms at the bottom of the linked page.

Best of luck tomorrow!

If you're taking part in Sunday's Cardiff Half Marathon instead, we've set up a different link where you can tell us all about it.