Celebrate Halloween all month at the Jacksonville Zoo, but just know the closer to the end of the month it is, the more packed it will be! Dates : October 14-16, 20-23 and 27-31. Guests are encouraged to dress up in family-friendly costumes to explore the winding pathways of themed decorations, mythical beings and sweet treats. Spooktacular features activities for all ages from trick-or-treating to scare zones. The zoo will be fully decked out. so if you have a little one, this should be on your radar!