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Brick-or-Treat Monster Party 2026 at Legoland California: crowd calendar

19 Sep to 1 Nov 202612 datesCarlsbad, California, United States

Brick-or-Treat Monster Party 2026 at Legoland California runs 19 Sep to 1 Nov 2026 and is forecast busy, averaging 69% crowd level. The quietest date is Sat 3 Oct at 60%, the busiest Sat 10 Oct at 79%.

Quietest date of Brick-or-Treat Monster Party 2026

Saturday 3 Oct

Brick-or-Treat Monster Party 2026 is forecast busy at Legoland California, averaging 69% crowd level across its 10 dates. The busiest is Saturday 10 Oct at 79%.

60%crowds
Next bestSun 1 Nov 63%Sun 18 Oct 65%Sun 25 Oct 66%

Across its 12 dates the forecast averages 69% crowd level, which is busier than a normal day here. That is 23 points busier than the same weeks measured in 2025 (46%). Expect lines to average around 30 minutes park-wide on a typical date.

Every date, with the forecast

September 2026

  1. Sat19No forecast
  2. Sat26No forecast

October 2026

  1. Sat360%~23 min
  2. Sun467%~28 min
  3. Sat1079%~41 min
  4. Sun1171%~32 min
  5. Sat1776%~37 min
  6. Sun1865%~27 min
  7. Sat2473%~33 min
  8. Sun2566%~28 min
  9. Sat3170%~30 min

November 2026

  1. Sun163%~25 min

The 20 days inside the run that Brick-or-Treat Monster Party does not operate on are forecast 45% on average, quieter than the event dates.

Quietest 0-15%Quieter 15-35%Typical 35-65%Busier 65-88%Busiest 88-100%

How the same weeks ran in 2025

Between 19 Sep and 1 Nov 2025 the park measured 46% on average over 31 recorded days. The busiest was Saturday 11 Oct at 78%, the quietest Tuesday 21 Oct at 20%. These are the same calendar weeks, not necessarily 2025's event dates.

Busiest days, measured

  1. 1Saturday 11 OctLines averaged 39 min78%
  2. 2Saturday 25 OctLines averaged 34 min73%
  3. 3Sunday 12 OctLines averaged 33 min72%
  4. 4Monday 13 OctLines averaged 29 min68%
  5. 5Saturday 18 OctLines averaged 29 min68%

Quietest days, measured

  1. 1Tuesday 21 OctLines averaged 7 min20%
  2. 2Thursday 30 OctLines averaged 7 min22%
  3. 3Tuesday 28 OctLines averaged 7 min22%
  4. 4Friday 31 OctLines averaged 8 min24%
  5. 5Thursday 23 OctLines averaged 8 min24%

Dates as published by Legoland California; 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.

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Frequently asked

When is Brick-or-Treat Monster Party 2026 at Legoland California?

Brick-or-Treat Monster Party 2026 runs 19 Sep to 1 Nov 2026, on weekends: 12 dates in total. Dates are as published by Legoland California.

What is the quietest date of Brick-or-Treat Monster Party 2026?

Saturday 3 Oct is forecast the quietest at 60% crowd level. The next best are Sun 1 Nov (63%), Sun 18 Oct (65%), Sun 25 Oct (66%).

What is the busiest date of Brick-or-Treat Monster Party 2026?

Saturday 10 Oct is forecast the busiest at 79%. The 3 dates that fall in the October break (17 Oct to 25 Oct) average 72%.

How busy is Brick-or-Treat Monster Party compared with a normal day at Legoland California?

The event dates average 69% crowd level, busier than a normal day here. The same weeks in 2025 measured 46% on average. The 20 days inside the run that Brick-or-Treat Monster Party does not operate on are forecast 45% on average, quieter than the event dates.