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The world's largest bounce house, a 50,000-square-foot inflatable with a 900-foot obstacle course, will operate at Contra Costa Fair and Event Park in Antioch on October 17–18 and October 24–25, 2026.

By Walnut Creek Times
Published October 1, 2026 at 9:03 PM PDT · 1 min read

Large red geometric inflatable structure on left with long horizontal red band and small shapes extending right across dark blue field, teal ground plane at bottom

A 50,000-square-foot bounce house billed as the world's largest is scheduled to set up at Contra Costa Fair and Event Park in Antioch over two weekends this month, Hoodline reported. The event runs Oct. 17–18 and Oct. 24–25.

The centerpiece is a 900-foot-long obstacle course, according to Hoodline. The setup also includes a sports arena with basketball hoops and soccer nets, climbing towers, slides, and a sci-fi-themed ball pit.

Tickets start at $35 for a three-hour pass that includes timed access to the bounce house and unlimited access to the other attractions, Hoodline reported. A DJ and food trucks will be on site both weekends.