Diamond Bar Halloween Events 2026
Your guide to the best Halloween events in Diamond Bar and nearby
Diamond Bar brings Halloween 2026 to life around its civic center and scenic parklands with haunted tours and spine-chilling activities.
Activities include eerie attractions, Halloween markets, and fall festivities at community centers and outdoor venues.
Editor's Picks
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Diamond Bar Halloween Party
Halloween fun for kids and dogs featuring trick-or-treating and costume contests.
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Haunted Mansion Holiday
· Whittier
Ghoul-tide surprises inspired by Tim Burton's The Nightmare Before Christmas.
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The 17th Door Haunted Attraction
· Buena Park
Immersive extreme haunt with a prison narrative and interactive elements.
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Knott's Scary Farm
· Buena Park
Southern California's longest-running Halloween theme park event.
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CHS Haunt: Escape the Murder Castle
· Ontario
Walkthrough haunt inspired by serial killer H.H. Holmes' infamous castle.
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The Haunted Harvest
· Chino
Six haunted houses spread across a two-acre corn maze.
Events Happening Soon
Browse Halloween Near Diamond Bar by Category
Family-Friendly Fall Activities
Halloween fun for kids and dogs featuring trick-or-treating and costume contests.
Haunted Experiences
Ghoul-tide surprises inspired by Tim Burton's The Nightmare Before Christmas.
Halloween Food, Drink, and Parties
Costumed murder mystery dinner with three-course meal
Halloween Movies, Theater, and Entertainment
Halloween themes and classical works performed by the Orchid Quartet under candlelight.
Unique & Unusual Halloween Events
Includes a ghoulish cocktail mixer and visits haunted downtown locations.
Diamond Bar Halloween Events Map
See every Halloween event, haunted attraction, and pumpkin patch on one map.
