Ontario Halloween 2025

See all Ontario Halloween happenings this year!

Ontario lights up Halloween 2025 across the main district and airport-adjacent neighborhoods with ghostly tours and frightful events. Plan to see spooky happenings, fall entertainment and Halloween gatherings including haunted houses, family festivals and pumpkin displays.

Find the best Ontario Halloween happenings this year!

Last updated: 11/11/2025 by HalloweenLocal.com editorial team

Ontario Halloween

Ontario Haunted Experiences

CHS Haunt: Murder Castle in Ontario

Details

CHS Haunt: Murder Castle

Friday, October 24, 2025

📍 Chaffey High School

1245 North Euclid Avenue, Ontario, CA

(1.2 mi from Ontario)

Event Details

👻 Scare Factor: 👻👻👻👻👻

💰 Budget: $$

🎃 Family Friendly: 🎃🎃🎃🎃🎃

⚡ Energy: Short

Event Description

Step into the chilling 'Murder Castle,' a haunted walkthrough experience based on the terrifying true story of H. H. Holmes, America's first serial killer. Explore the infamous house where he committed unspeakable acts, and confront the darkness that lurked within its walls. This immersive attraction promises a thrilling journey through a dark chapter of history.

haunted_househaunted_attractionhalloween_festivalcommunity_eventhorror_movie_screening

⭐ Best For: Thrill-seekers and horror enthusiasts

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Ontario Family-Friendly Fall Activities

A teacher leads a group of young children in Halloween-themed crafts, with pumpkins, ghost figures, and skeleton decorations visible on a table in a classroom setting.

Details

Spooktacular Halloween

Monday, October 27, 2025

📍 Ovitt Family Community Library

215 E C St, Ontario, CA 91764

(0.2 mi from Ontario)

Event Details

👻 Scare Factor: 👻👻👻👻👻

💰 Budget: FREE

🎃 Family Friendly: 🎃🎃🎃🎃🎃

⚡ Energy: Low

Event Description

Get into the Halloween spirit at the Spooktacular Halloween event! Designed for ages 5-12, this event at the Ovitt Family Community Library offers a chance for kids to showcase their costumes. Participants can get creative with crafts like ghostly glow jars and skull bean art, and test their bravery with spooky sensory boxes. It's a perfect way to celebrate the season with ghoulish fun.

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⭐ Best For: Children aged 5-12

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Ontario Other Halloween Activities

Two anime-style characters, a boy and a girl with glasses, stand in a crowded convention hall with Halloween decorations and banners visible in the background.

Details

Creep I.E. Con V

Friday, January 30, 2026

📍 Ontario Convention Center

2000 E Convention Center Way, Ontario, CA 91764

(2.5 mi from Ontario)

Event Details

👻 Scare Factor: 👻👻👻👻👻

💰 Budget: $$

🎃 Family Friendly: 🎃🎃🎃🎃🎃

⚡ Energy: High

Event Description

Creep I.E. Con V is the Inland Empire's premier horror fan convention, offering three full days of thrilling activities. Attendees can meet celebrity guests, explore spine-chilling horror exhibits, shop from over 170 vendors, and enjoy Q&A panels. It's an unforgettable experience for horror enthusiasts and pop culture fans alike.

horror_conventioncosplayvendorscelebrity_guestsfamily_friendly

⭐ Best For: Horror fans, pop culture enthusiasts, collectors

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Halloween Near Ontario

Chino Hills Halloween

A cartoon illustration of a Halloween scene with a young woman in the foreground, surrounded by spooky creatures, pumpkins, and haunted houses under a full moon with bats flying in the sky.

Chino

Details

The Haunted Harvest (Chino)

📍 Frosty's Forest & Pumpkin Patch

Sep 26, 2025

(6.4 mi from Ontario)

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City of Chino Hills Trick or Treat in Chino Hills

Chino Hills

Details

City of Chino Hills Trick or Treat (Chino Hills)

📍 The Shoppes at Chino Hills

Oct 31, 2025

(6.3 mi from Ontario)

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Corona Halloween

Castle Dark in Riverside

Riverside

Details

Castle Dark (Riverside)

📍 Castle Park

Oct 18, 2025

(15.2 mi from Ontario)

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City of Corona Halloweekend in Corona

Corona

Details

City of Corona Halloweekend (Corona)

📍 City of Corona

Oct 10, 2025

(13.9 mi from Ontario)

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Riverside Halloween

A vibrant Halloween festival scene in a park at dusk, with people browsing stalls, large pumpkins, and bats flying under a full moon.

Riverside

Details

Riverside Halloween Fest (Riverside)

📍 White Park

(16.6 mi from Ontario)

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Halfway to Halloween Festival in Jurupa Valley

Jurupa Valley

Details

Halfway to Halloween Festival (Jurupa Valley)

📍 Rancho Jurupa Park

May 2, 2025

(14.9 mi from Ontario)

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Anaheim Halloween

A woman in a floral crown holds a pumpkin, flanked by two people in skeleton costumes, one holding a prop rifle, during an autumn festival.

Anaheim

Details

Anaheim Fall Festival and Halloween Parade (Anaheim)

📍 Center Greens

Oct 25, 2025

(21.7 mi from Ontario)

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Jack Skellington stands between two children dressed in Halloween costumes in front of a spooky castle under a full moon.

Anaheim

Details

Haunted Mansion Holiday (Anaheim)

📍 Disneyland Park

Aug 22, 2025

(23.1 mi from Ontario)

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Alhambra Halloween

A bustling outdoor market stall decorated for Halloween, with pumpkins, gourds, and festive lights adorning the scene. People are browsing the goods, creating a lively and autumnal atmosphere.

Alhambra

Details

Main Street Market - Wicked Wonders Halloween Edition (Alhambra)

📍 Renaissance Plaza

Oct 5, 2025

(27.3 mi from Ontario)

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Alhambra Annual Kids Costume Contest & Trick-or-Treat in Alhambra

Alhambra

Details

Alhambra Annual Kids Costume Contest & Trick-or-Treat (Alhambra)

📍 Downtown Alhambra

Oct 26, 2025

(27.4 mi from Ontario)

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Costa Mesa Halloween

A young woman in a witch costume stands next to a car decorated with Halloween themes, including pumpkins and the words "Happ-Sew Wick".

Costa Mesa

Details

The Boo Ha Ha Halloween Party (Costa Mesa)

📍 OC Fair & Event Center

Oct 25, 2025

(31.0 mi from Ontario)

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San Pacho Halloween Night Party in Costa Mesa

Costa Mesa

Details

San Pacho Halloween Night Party (Costa Mesa)

📍 TIME Nightclub

Oct 31, 2025

(32.9 mi from Ontario)

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Los Angeles Halloween

A group of people are seated in a grand, ornate hall with a large pipe organ in the background, attending what appears to be a performance or ceremony. A carved jack-o'-lantern sits on a seat in the foreground, suggesting a Halloween theme.

Los Angeles

Details

Halloween Organ, Film & Music: The Hunchback of Notre Dame (Los Angeles)

📍 Walt Disney Concert Hall

Oct 31, 2025

(34.2 mi from Ontario)

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La Ofrenda Festival & Wellness Fair in Gilroy

Gilroy

Details

La Ofrenda Festival & Wellness Fair (Gilroy)

📍 Downtown Gilroy

Nov 1, 2025

(34.4 mi from Ontario)

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Yucaipa Halloween

Four friends in Halloween costumes, including witch hats and bunny ears, are at a pumpkin patch with a Ferris wheel and carnival tents in the background.

Big Bear Lake

Details

Halloween & October Fun in Big Bear Lake (Big Bear Lake)

📍 Big Bear Lake

Sep 20, 2025

(44.2 mi from Ontario)

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A couple walks down a street lined with houses decorated for Halloween, with pumpkins and fallen leaves scattered around. A vintage car with its hood open is parked on the side of the road.

Yucaipa

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Yucaipa Autumnfest (Yucaipa)

📍 Historic Uptown Yucaipa

Sep 27, 2025

(35.1 mi from Ontario)

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Glendale Halloween

Los Angeles Haunted Hayride in Los Angeles

Los Angeles

Details

Los Angeles Haunted Hayride (Los Angeles)

📍 Los Angeles Haunted Hayride

Sep 19, 2025

(37.3 mi from Ontario)

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A spooky haunted mansion with glowing windows and a large full moon overhead, set against a dark, cloudy sky with bats flying. Ghosts are visible in the foreground, one holding a glass of red wine, and a Ouija board is laid out on the ground.

Glendale

Details

House of Spirits: A Haunted Cocktail Masquerade (Glendale)

📍 Historic Glendale Theater

(35.2 mi from Ontario)

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Long Beach Halloween

A terrifying werewolf-like creature with glowing red eyes and skeletal features lunges from the shadows of a dark, misty graveyard towards two terrified people running away. The scene is illuminated by eerie red and green lights, with glowing red crosses on tombstones adding to the horrifying atmosphere.

Long Beach

Details

Queen Mary's Dark Harbor (Long Beach)

📍 The Queen Mary

Sep 26, 2025

(37.7 mi from Ontario)

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A Halloween convention with booths displaying horror-themed art and merchandise, decorated with pumpkins and bats, and a crowd of people browsing.

Long Beach

Details

Midsummer Scream Halloween and Horror Convention (Long Beach)

📍 Long Beach Convention Center

Aug 15, 2025

(37.2 mi from Ontario)

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See all 13 events in Long Beach →

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Our Process

With 20 years of experience, we use AI technology to build the most comprehensive list of halloween events.

Our goal is complete coverage—from major festivals to small community celebrations, ensuring you never miss anything happening in your area.

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