How can I contact Tough Mudder? Tough Mudder is an email only customer support service. To contact Mudder Services, please email UKsupport@toughmudder.com. Related articles Tough Mudder UK and COVID-19 Start Time Selection How do I register for an event? Toughest Mudder Tough Mudder UK Challenges and Training Waiver and Terms of Purchase Comments 0 comments Article is closed for comments.