Tough Mudder London South 2021


Tough Mudder London South 2021

Join us

Get ready to prove how tough you really are with Tough Mudder, the ultimate obstacle challenge! You’ll overcome icy water, extreme mud, fire, electricity, rope climbing and much, much more, all to raise to money help those living with cancer live life as fully as they can.

How to enter

Taking part in Tough Mudder London South couldn’t be easier! Here's how to get yourself signed up:

Macmillan Charity Place: We offer charity places in the Classic (10 miles and 25 obstacles) and 5k (13 obstacle) distances. Our Charity Places have a £30 registration fee* and we ask you to raise £300 to help support people living with cancer.

Get your Own Place: If you already have your own place (in any distance) from the Tough Mudder website and would like to support us, please let us know by clicking the 'I have my own place' button. There’s no minimum sponsorship, simply raise as much as you can and the money you raise will help fund our vital work.

Sign up as a team: Sign up as a team of 3 or more and get 20% off your registration. Please get in touch with our team by emailing or calling 0300 1000 200 for details.

To order your team t-shirts, please select 'no t-shirts' when registering and get in touch with us to order them.

What do I get as part of #TeamMacmillan?

As part of Team Macmillan, we’ll make sure you have:

  • Our bumper fundraising pack, access to our online training zone and loads of fundraising tips and tricks.
  • Your free Team Macmillan technical running vest or t-shirt, plus iron on letters to customise your kit.
  • Regular e-newsletters keeping you in the loop in the lead up to race day.
  • A dedicated Facebook group to meet your fellow Tough Mudders.

Most importantly, we will provide you with a reason to put in those months of training and fundraising, because you know that your efforts are going towards improving the lives of people living with cancer in the UK today.

Why be part of the green team?

We want to use this amazing event to make a difference. We know cancer can affect everything; your body, your relationships, your money, everything. But we’re here to help people live life, no matter what. We give them the support they need to hold on to who they are and what’s important.

But we can’t do it without you. Join Team Macmillan and we will treat you like the superhero you are from the moment you sign up through to when you cross the finish line.

You must be aged 14 or over on the day of the event to take part. Any participants under 18 must take part with someone 18+.

*The registration fee is payable to Macmillan Cancer Support Trading Limited which is wholly owned subsidiary of Macmillan Cancer Support. Macmillan Cancer Support Trading Limited donates 100% of its profits to Macmillan Cancer Support each year.

For full terms & conditions click here.

If you have a question about running for Macmillan, check out our FAQs.

Alternatively, you can email us at or call on 0300 1000 200.

Looking for a different Tough Mudder?

Find our other Tough Mudder events here.

I have my own placeIf you've already got your own place and want to raise money for Macmillan.
Get a placeWe ask for a minimum sponsorship pledge of £300, with a £30 registration fee.

If you raise


it could pay for a Macmillan nurse for a week.

More in this section

Organise your own event

Get your plans rolling. We've got advice, support, materials and fundraisers who'd love to help you create a great event.

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Go your own way

If you would like to take on a challenge for Macmillan which isn't in our listed events, no problem! Tell us which one you're doing and we'll send you a fundraising pack.

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Help with fundraising

From fundraising resources and ideas to online fundraising tips and information about paying in your donations. We'll help you raise as much as possible for Macmillan.

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Training Zone

Find training, nutrition and kit advice for whichever type of event you are doing.