What is the age limit for the Lidl Mudder course? Lidl Mudder is available for children aged 5 – 12, however any child taking part must also be taller than 1.1m (3.5 foot). Related articles Do I need to buy a spectator ticket with my Lidl Mudder registration? How long is the Lidl Mudder course? Is there a minimum age to run a Tough Mudder? Who can do a Tough Mudder? Will there be food and water on course? Comments 0 comments Article is closed for comments.