Event Sioux Falls halloween carnivals Spooky Seas 🕗 Sat Oct 25 2025 at 10:00 am to 04:00 pm (CDT) 📍 4320 S. Oxbow Ave., Sioux Falls, SD, United States, South Dakota 57106 Advertisement Join us for our annual Halloween celebration! Stay tuned for tickets and more info! I'm interested Advertisement Created by: Butterfly House & Aquarium Share with someone you care for! View all events in Sioux Falls Best of Sioux Falls Events in Your Inbox Subscribe to event updates Unsubscribe from updates