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Six Flags Great America (IL) Closing Hours by Season

Closing times at Six Flags Great America in Gurnee, Illinois vary significantly by season and event. Always verify on the official park calendar for your specific date.

Typical Seasonal Schedule

Season / Event	Weekdays	Weekends & Holidays
Regular Season (Mar–Oct)	8:00 PM	9:00 PM
Fright Fest (Sep–Oct)	9:00 PM (select days)	10:00 PM
WinterFest (Nov–Dec)	10:00 PM (select days, often opens 4 PM)	10:00 PM (often opens 1 PM)
Holiday Break (Late Dec–Jan)	Varies; typically 11:00 AM – 7:00 PM

Key Notes

Park usually opens at 10:00 AM (Regular/Fright Fest) or later (WinterFest).
Water park (Hurricane Harbor) has separate, earlier closing times.
Ride closures begin 30–60 mins before park close.
Special events (concerts, fireworks) can extend hours.

Pro tip: Download the Six Flags app for real-time hours, wait times, and show schedules on your visit day.

The Missouri River: America's Longest River

Six Flags Daily Attendance: Estimated ~84,500 Across All Parks

United States