About 1800 people took part in the Muddy Good Run at the Canterbury Agricultural Park on Sunday.
Organiser John Moore said more than 1000 children aged 4 to 13 competed in the fun run, setting an attendance record for the event.
“They love it, it’s just unbelievable. There’s a smile on every face,” he said. “It’s what everyone wants – it brings out the big kid in everyone. Kids love it, adults love it.”