Infinity racers will take on the 15K course at North West in fresh mud, and then stack on additional chip-timed 15k or 5k laps.

If you're looking for up-to-the-neck, concrete-thick, never-getting-clean mud then there's only one Tough Mudder for you! 

Packed full of teamwork-demanding obstacles Tough Mudder might be renowned for being the muddiest but that doesn't mean we're letting you off lightly.

Find out more about taking on a challenge for Bolton Hospice here