London Halloween Walk Trick or treat yourself to this 15km themed walk in London. Show off your best outfits and join in the fun! Gather your bravest guys and ghouls to bring a team, or go it alone and meet like-minded walkers. Get into the spirit and get exorcising this October. A mix of tricks and treats with entertainment from a cast of zombies and ghouls before an interesting and challenging walk - all eerily quiet in the dead of night. With a dedicated team of marshals who will appear in all sorts of hellish forms - zombies, devils and vampires will all be on hand to help and support you throughout the night. Take on the challenge and see London's well known land marks in the eerie dead of night and stop off on route for tricks and treats at our rest stops. Learn all about the city's dark and interesting past along the way.