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? Tough Mudder UK and COVID-19 Start Time Selection Tough Mudder UK Challenges and Training Waiver and Terms of Purchase International Shipping & Tracking Comments 0 comments Article is closed for comments.