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This is a Betwixtmas challenge for the hardiest of map nerds - UK Parkrunners!

These are all London Parkrun courses (and by London, we mean within the M25). Can you identify them all and solve the puzzle buried within?

If you think you've solved it, and  NONE have so far, email hello@enigmailed.com with your answer.

Successful London Finishers will be listed here.

If you've like other flavours, and there is enough interest, please get in touch!

(The UK Advent game can be found here).

Why not have a look at our virtual challenges while you are here, via runNERDS? Fancy running every Prime day, Triangular, Fibonnaci or Square day in 2026, or even Pi Day?