3 Ninjas: High Noon at Mega Mountain is a 1998 American martial arts film, and the fourth and last installment in the 3 Ninjas franchise. High Noon at Mega Mountain starred only three of the original actors and was directed by Sean McNamara. None of the child actors from the previous films returned for this installment. The film grossed US$ $375,805 domestically, making it the least profitable of the franchise by far. It was filmed in Denver, Colorado at Elitch Gardens Amusement Park.