London Ultramarathon Events

The Event is a multiple lap comprising three distances (Half Marathon, Full Marathon and Ultra Marathon 50km plus) all starting at Sunrise and finishing by Sunset. There is also a 10km race that happens on the same day. Each lap is officially measured at 2.014k and is registered as the Fauja Singh Training Course. There is a feeding station at the start/finish of each lap.

Who will it be this year??

The clue is in the name - You really, really won't want to miss out on this one.

Fancy dress is definitely the order of the day. Who will you come as?

From 5km to ultra, you can complete as many, or as few laps as you like of a 3.28 mile, out and back, course along the beautiful river Thames. We welcome all abilities of runner - complete one lap and you're both a finisher and a winner in our eyes, or keep going and see how far you can get in the full 6-hour time limit and everyone gets the fabulous bespoke finishers' medal.

This ultramarathon is the last leg of The Monster Triathlon and takes you along the banks of the Thames. The route utilises much of the Thames Path as it winds its way towards the finish venue in Richmond.

You can book the whole 7-day triathlon here (www.letsdothis.com/e/monster-triathlon-107279), or just book this 50km ultramarathon as a standalone run.