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Opening September 19 - Reopening for 2026. Hours, dates, and admission may vary — check official site for current details. Last verified: 8/31/2026 Grimm's Hollow is the Bay Area's premier family Halloween adventure! For a REALLY scary good time, stick around for The Maelstrom*, where the claws come out, teeth are borne, and all who enter must try to escape Davy Jones Locker alive!
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