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Event details
  • . 36 days left to book
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Join in the Monster Experience and take part in the last leg of the Monster Triathlon with this 50k ultramarathon. Push yourself while you enjoy scenic views from Windsor along the Thames Path and celebrate crossing the finish line in Richmond.
C-19 Plan
WMP Creative has confirmed that this event will be going ahead as planned on Friday 25th Jun 2021 in accordance with the COVID-19 safety measures. Learn more

How to enter the Monster Run

  1. 50K

    Run 50km
    Book Now

Monster Run route

The Monster Triathlon concludes with an 50k ultra-marathon along the banks of the Thames and the route utilises much of the Thames Path as it winds its way towards the finish venue in Richmond.

This is an ideal opportunity for those in and around London to take part in an ultramarathon, and the event counts for UTMB qualifying points.

Event Details

What’s Included

What’s included:

  • Support vehicles
  • Medical Support
  • Event t-shirt
  • GPX route files
  • Finishers celebration event (food & drinks)
  • Full participant info pack and event manual
  • Sports physio and massage(supplement)
  • Finishers medal
Raceday Logistics

Monster Runners taking part need to be at the start point in Windsor before 7am on Saturday 26th June 2021.

Kit List

As with all outdoor events, it’s wise to dress for all eventualities.


Spectators are more than welcome - the best place to cheers on the runners is either at the start or finish area.


No volunteers needed.

Frequently Asked Questions

What safety measures are there for the event?
The Event Team includes medics, who are on hand to help you with scrapes and bruises of all sizes. They also know all the nearest hospitals all along the route. Before you set off on each day the event, you will be given a briefing – to make sure you enjoy a healthy and safe day.
How old do I have to be to take part?
This event is only open to people over the age of 18.
What information will we get about taking part?
You will receive a welcome email covering travel, what to bring, maps, directions and so on before the event.

Meet the organiser

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Tickets £35

Book Now
  • Official booking partner
  • Best price guarantee
  • Free injury protection

Have a question? See our Help Center

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