Diamond Bar Halloween Events 2026

Browse Halloween in Diamond Bar

Illustration of a pumpkin patch with many orange pumpkins on curling vines, a red wheelbarrow, and a small wooden farm stand Diamond BarFamily-Friendly Fall Activities57 family events Illustration of a guide holding up a lantern before a small group on a foggy cobblestone street past headstones at night Diamond BarHaunted Experiences18 haunted attractions Illustration of a vampire bartender shaking a drink at a Halloween bar with cocktails, pumpkins and green potion flasks Diamond BarHalloween Food, Drink, and Parties10 parties & tastings Illustration of an outdoor movie night with a big blank screen, lawn chairs, blankets and pumpkins under a starry sky Diamond BarHalloween Movies, Theater, and Entertainment7 shows & screenings Illustration of a Halloween town at night with glowing windows, pumpkins, floating ghosts and a witch flying past a full moon Diamond BarUnique Halloween Events34 unique events

Editor's Picks

Illustration of glowing jack-o'-lanterns, candles and scattered seeds on a wooden table under string lights at dusk (Diamond Bar Halloween Party) Diamond Bar Halloween PartySat, Oct 31Halloween fun for kids and dogs featuring trick-or-treating and costume contests. Illustration of a small haunted cottage with glowing windows, ghosts, pumpkins and a black cat under a big pale moon (Haunted Mansion Holiday) Haunted Mansion HolidayWhittier · Aug 21 – Oct 31Ghoul-tide surprises inspired by Tim Burton's The Nightmare Before Christmas. Illustration of a dark haunted house on a hill with a lit window, bare trees, a crow on a fence and a stone path (The 17th Door Haunted Attraction) The 17th Door Haunted AttractionBuena Park · Sep 25 – Nov 1Immersive extreme haunt with a prison narrative and interactive elements. Illustration of a dark haunted house with glowing red windows, a stone path, gravestones and dead trees under a full moon (Knott's Scary Farm) Knott's Scary FarmBuena Park · Sep 17 – Oct 31Southern California's longest-running Halloween theme park event. Illustration of a spooky old house with a glowing window on a hill under a full moon, with bare trees and gravestones (CHS Haunt: Escape the Murder Castle) CHS Haunt: Escape the Murder CastleOntario · Oct 23 – Oct 31Walkthrough haunt inspired by serial killer H.H. Holmes' infamous castle. Illustration of a haunted house on a hill under a full moon, red light glowing from the doorway where a figure stands (The Haunted Harvest) The Haunted HarvestChino · Sep 25 – Oct 31Six haunted houses spread across a two-acre corn maze.

Events Happening Soon

Fri16Oct 2026 Trunk or TreatWest Covina Illustration of a ghost and two costumed kids trick or treating past glowing houses with pumpkins and autumn leaves at dusk (2026 Trunk or Treat) Thu29Oct OktoBOOfestFullerton Illustration of striped market booths and pumpkin displays on a street with small clay figures under orange autumn trees (OktoBOOfest) Fri30Oct Fright DiveLong Beach Illustration of clay figures in costumes and a floating ghost at a Halloween party with a punch bowl and glowing pumpkins (Fright Dive)

About Halloween in Diamond Bar

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.

Latest Halloween news and updates in Diamond Bar

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Diamond Bar Halloween Events Map

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Diamond Bar Halloween events map

Halloween in Nearby Cities

Walnut 3 mi away · 4 events Chino Hills 5 mi away · 5 events Pomona 5 mi away · 4 events South San Jose Hills 6 mi away Rowland Heights 6 mi away Chino 7 mi away · 2 events

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