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There are so many ways you can get involved and support Chestnut Tree House


Operation: MUD

Are you brave enough to take on over 60+ challenging obstacles


Be your best for Chestnut Tree House


Our muddiest event, will take place on Sunday 8 July in Dorking, Surrey and is not for the faint-hearted.  With over 60 challenging obstacles and held on a gruelling course, crowned as the toughest and muddiest 5km military course in UK.

Well done to everyone who took part in Operation: Mud, to view your completion time please click here.

Event highlights:

  • Chip timing
  • 60+ challenging obstacles
  • Voted one of the muddiest runs in the UK
  • Team registration available
  • Free parking
  • Event village on site with food and drinks available to purchase
  • Medal for all finishers

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!


Team Daisy’s Mud Run

Team Daisy’s mud run will also take place on Sunday 8 July in separate morning race waves, to enter these exclusive race waves, select Team Daisy’s Mud Run entrant from the registration categories on the registration link here.

All sponsorship raised by Team Daisy will also go directly to Chestnut Tree House to support children and families being cared for at the hospice and in the local community.

Advanced Entries

Entry for both events is £44 per person (including booking fee).

From 30 April 2018, prices will rise to £50 per person (including booking fee).

There is no minimum sponsorship required, you are invited to raise as much as you can for Chestnut Tree House and help us continue to provide vital care services for life-limited children across Sussex and South East Hampshire.

Contact Us

Please contact the Chestnut Tree House Events Team if you have any questions relating to OperationMUD or Team Daisy’s Mud Run on 01323 725095 or email events@chestnut-tree-house.org.uk

Not keen on head to toe mud?

If running’s not for you, why not join our fantastic team of volunteers? We need helpers on the day to help make this year’s  OperationMUD the best yet. Shifts are available throughout the day. Roles include:

  • Event set up
  • Marshalling
  • Handing out medals
  • Water stop marshal
  • Event break down

If you’d like to get involved, click here to register your interest or call Angie Bacon on 01903 706326.

We look forward to welcoming you to our team!