on during the month of October in the Magic Kingdom, but you need seperate admission for this event that goes on at night after the park closes. If you have children it is a lot of fun(even without them!). Your kids can dress up and go trick or treating around the park and there are characters all around dressed up and there is a special parade. It is worth the extra money in our opinion, we always have alot of fun. You can get info if you call WDW and speak with a cast member. I'm not sure how much it is. Hope this helps!