30sepAll Day02octHalloween Spooktacular Weekend 1It's Halloween at Jellystone Park! Activities will include loads of fun and plenty of scares! Join us for arts, crafts, activities, pumpkin carving, costume contests, and a campsite/cabin decorating contest! Our campers are known for competitive decorating, outdoor cooking, and having a good time. Prizes awarded for first-fifth places in campsite/cabin contests. Don't forget candy for the trick or treaters!