Skip to main content
Park Queue TimesPQT

Fright Fest 2026 at Six Flags St Louis: crowd calendar

12 Sep to 1 Nov 202622 nightsEureka, Missouri, United States

Fright Fest 2026 at Six Flags St Louis runs 12 Sep to 1 Nov 2026 and is forecast moderately busy, averaging 44% crowd level. The quietest night is Fri 2 Oct at 5%, the busiest Sat 10 Oct at 78%.

Quietest night of Fright Fest 2026

Friday 2 Oct

Fright Fest 2026 is forecast moderately busy at Six Flags St Louis, averaging 44% crowd level across its 14 nights. The busiest is Saturday 10 Oct at 78%.

5%crowds
Next bestSat 3 Oct 5%Sun 4 Oct 5%Fri 23 Oct 23%

Across its 22 nights the forecast averages 44% crowd level, which is about a normal day for this park.

Fright Fest is an evening event, so the crowd figures above describe the whole day at Six Flags St Louis, not the event hours alone. Boo Fest runs alongside it during the day, on the same dates.

Every night, with the forecast

September 2026

  1. Sat12No forecast
  2. Sun13No forecast
  3. Sat19No forecast
  4. Sun20No forecast
  5. Fri25No forecast
  6. Sat26No forecast
  7. Sun27No forecast

October 2026

  1. Fri25%
  2. Sat35%
  3. Sun45%
  4. Fri935%
  5. Sat1078%
  6. Sun1177%
  7. Fri1627%
  8. Sat1775%
  9. Sun1857%
  10. Fri2323%
  11. Sat2473%
  12. Sun2556%
  13. Fri3026%
  14. Sat3172%

November 2026

  1. Sun1No forecast
Quietest 0-15%Quieter 15-35%Typical 35-65%Busier 65-88%Busiest 88-100%

Dates as published by Six Flags St Louis; always check the park's own site before travelling. Crowd levels are modelled from this park's own recorded queue times, school and public holidays, day of the week and the weather forecast, and may not always be right. We score every past forecast against what the queues actually did and publish the result in the crowd forecast accuracy ledger.

Mickey's Not-So-Scary Halloween Party · Magic KingdomOogie Boogie Bash - A Disney Halloween Party · Disney California AdventureHalloween Time · Disney California AdventureHalloween Time at Disneyland Resort · Disneyland ParkHalloween Horror Nights · Universal Studios Florida ParkHalloween Spooktacular · Seaworld OrlandoHalloween Horror Nights Hollywood · Universal Studios HollywoodBrick-or-Treat · Legoland OrlandoEvery seasonal event we forecast

Frequently asked

When is Fright Fest 2026 at Six Flags St Louis?

Fright Fest 2026 runs 12 Sep to 1 Nov 2026, on Fridays to Sundays: 22 nights in total. Dates are as published by Six Flags St Louis.

What is the quietest night of Fright Fest 2026?

Friday 2 Oct is forecast the quietest at 5% crowd level. The next best are Sat 3 Oct (5%), Sun 4 Oct (5%), Fri 23 Oct (23%).

What is the busiest night of Fright Fest 2026?

Saturday 10 Oct is forecast the busiest at 78%. The 8 nights that fall in the Summer (12 Sep to 30 Oct) average 47%.

How busy is Fright Fest compared with a normal day at Six Flags St Louis?

The event nights average 44% crowd level, about a normal day for this park.

Do I need a separate ticket for Fright Fest?

Fright Fest runs in the evening, with Boo Fest during the day. Check Six Flags St Louis's own site for what your ticket includes on the day you visit.