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 How do I register for an event? Toughest Mudder Tough Mudder UK Challenges and Training Waiver and Terms of Purchase How long will it take to complete a Tough Mudder? I bought multiple registrations for me and my friend, why did I only receive one ticket? Comments 0 comments Article is closed for comments.