Join the City of Onalaska Department of Parks & Recreation for our Annual Halloween Bash! Families with children are invited to attend for an evening of tricks and treats at the Onalaska Omni Center. Attendees are encouraged to arrive in costume and trick-or-treat through the decorated hallways with local Onalaska businesses. The Halloween Bash will also feature trick-or-treating, games, surprises, inflatables, food & fun for the whole family, all in one safe and supervised location! Admission is free to all, though an optional donation of a non-perishable food item is encouraged