Date: 19 September to 20 September 2026
Tough Mudder London South, Holmbush Estate, Crawley Road, Faygate, West Sussex, RH12 4SE
Get ready to get filthy at Tough Mudder London South - set in the wild, wooded terrain of Holmbush Estate, just outside London. Take on the 5K or 15K course packed with 12+ or 20+ obstacles with the added challenge of knee-juddering hills, natural mudslides, and gravity-defying climbs and crawls. Earn your headband, medal, and finisher tee, then dive into the festival vibe of Mudder Village with music, food, and that well-deserved celebratory drink. Gather your team, test your limits, and see if you're muddy enough for London South.
Whether you choose the 5km or 15km distance, you’ll be joining thousands of Mudders pushing their limits while raising vital funds to support mental health - participants must be 17 to take part.
Registration fee: £30 Minimum fundraising target: £300
Charity places & how to register
We have a limited number of charity places available for this event. To apply for a place, please complete the 'Apply for a Charity Place' form on this page. If your application is successful, we’ll send you a registration link to pay the £30 charity registration fee. Your charity place will only be secured and confirmed once this payment has been received.
Once registered with us, we’ll email you full instructions on how to complete your official Tough Mudder sign-up. When signing up on the Tough Mudder website, you’ll be able to choose your event day and distance (5km or 15km) - you won't need to pay anything extra. As part of your registration, a personal fundraising page will be automatically set up for you via Givestar, so you can start fundraising straight away.
Please note: Tough Mudder Infinity is not included with Mental Health Foundation charity places and requires a separate entry.
Already have a Tough Mudder place?
If you’ve already secured your own Tough Mudder entry, we’d still love for you to fundraise with us - please just drop us and email at events@mentalhealth.org.uk - we would love to welcome you to the Mental Health Foundation Tough Mudder 2026 Team.
If you have any questions, please contact the Events Team directly by sending an email to events@mentalhealth.org.uk or by calling 0141 572 0125.