Get amped, Mudders, you’ve never seen mud like this before. Tough Mudder London South is the headline act of the year, and Holmbush Estate sets the perfect, filthy stage for all the antics we have in store.
The energy will be up, the obstacles will be tough, and the mud will be flowing. It’s the biggest global event on the calendar, and we’re expecting more than 17,000 of your chipper faces on event day, ready to dirty up.
Counting down the days already? Read on to see what’s coming down the tailpipe.
The Dirty Details
- Date: 20 & 21 September, 2025
- Venue: Holmbush Estate
- Location: 45 mins from London City Centre
- Distances: 5K, 15K, Kids
Meet Your Mud at Holmbush Estate

Gear up for one of our most challenging courses: Holmbush Estate’s terrain features extensive wooded trails, dense forest, and endless hills with inclines that’ll have your calves begging for mercy. Unfortunately, we won’t oblige.
We’re getting our most intense obstacles ready to put your squad to the test. Get ready to reach epic highs and lows—literally, you’ll be climbing and crawling through these bad boys—with your crew by your side. And while we’ve packed in enough mud to contest even the most dedicated laundry detergent, be on the lookout for natural mudslides that will put your balance to the test.
As the biggest event on the calendar, London South is where we often test brand-new obstacles that will keep you on your toes – or flat on your face.
Known as the biggest mud party outside of Glastonbury, it’s a day for pushing limits, having a laugh, and embracing the mud in style.
Make a Weekend Out of It

It’s not just a mud run – it’s an experience. The festival atmosphere is unbeatable, and you can expect the biggest mud party outside Glastonbury (or so we’ve been told).
But the fun doesn’t stop at the finish line. Once you’ve conquered the course (and your finisher beverage) check out our recommendations for things to do in London South. Explore all the history, culture, and adventure London South has to offer and revel in a weekend you’ll never forget.
Sound like a dream (or maybe nightmare is more appropriate?) come true? Sign up today and prepare to prove yourself in the mud.