Kids Boo Fest

Saturdays & Sundays, September 13 - November 2, 2025

Embrace fall with a spooktacular Halloween daytime celebration for all ages at Six Flags St. Louis. Savor unBOOlievable entertainment, family-friendly activities, trick-or-treat trails, and Halloween-themed experiences that are perfect for little ghouls and goblins. All this, plus your favorite family and thrill rides, make Kids Boo Fest a daytime Halloween adventure for everyone.