We sent pet writer Rachel Spencer and her dog Daisy to experience it.
We've heard of humans taking part in muddy obstacle races, but now our four-legged friends are getting in on the action with a series of Muddy Dog Challenges run by Battersea Dogs and Cats Home.
Do you fancy a fun challenge to help you get in shape for the summer? If so, why not take on the Muddy Dog Challenge and help support the work of Battersea Dogs & Cats Home while you're at it.
The Muddy Dog Challenge is an event with a difference, because not only can you run the muddy obstacle course, if you have a dog they can take part too. In 2018, Muddy Dog Challenges will take place in Windsor, Nottingham, Manchester, Peterborough, Cardiff and Tunbridge Wells.
Rachel Spencer and her dog Daisy braved the mud at last year's event, and spoke with pet experts at the event. Here, she shares what she learned about tackling a Muddy Dog Challenge with your pet.
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Finally, make sure you have pet insurance for your dog, so you know you'll be covered if anything should happen.
Full training and fundraising support will be given to all participants to help you make the most of the challenge. These tips should see you and your dog through the Muddy Dog Challenge, and even come in handy all year round. When you're outdoors, whatever the weather, let your dog be a dog and have fun.