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Operation: MUD


A 5km mud run with 60+ challenging obstacles


Congratulations and thank you to all our 2017 event participants, we hope you had a muddy time out on the course!

Download your event photos for free!

We have lots of fantastic photos from our very first Operation: MUD event.  View our gallery here



Operation: MUD, our brand new event for 2017, will take place on Sunday 9 July in Dorking, Surrey.  With over 60 challenging obstacles and claimed as one of the muddiest runs in the UK, this 5km military course is not for the faint-hearted!

Event highlights:

  • Chip timing
  • 60+ challenging obstacles
  • Voted one of the muddiest runs in the UK
  • Team registration available

Are you ready to Be Your Best for Chestnut Tree House?  Take a look at our film to see if you’ve got what it takes!