What are the requirements for my child to participate? All children participating in Tough Mudder Kids must: Be between the ages 5-12 years old Athletic, laced, closed-toe sneakers Have a parent present at all times Related articles How much time does a Tough Mudder Kids course take to complete? Is there a minimum age to run a Tough Mudder? What is Tough Mudder Kids? Can I help my Tough Mudder Kid? Is Tough Mudder Kids safe? Comments 0 comments Article is closed for comments.