Top 6 Family Halloween 2026 Events in Marin County: Pumpkin Farms to Sausalito. Marin County offers a particularly local version of Halloween: organic pumpkins from working West Marin farms, storybook-costume activities near the Golden Gate Bridge and merchant trick-or-treating in Larkspur. Rather than drive to a distant theme park, families can mix a daylight harvest trip with a modest neighborhood party. All six selections have a published 2026 season or event date, and our picks cover children from preschool age upward.

Checked October 10, 2026: Organizer schedules, admission, age limits and weather policies may change. This is an editorial selection of 6 locations and events, not a popularity ranking. Verify your chosen date directly before driving.

2026 Marin County Halloween family calendar

Place or event Where When
Goblin Jamboree at Bay Area Discovery Museum Sausalito — Fort Baker October 10–11, 17–18, 24–25 and 31, 2026 (remaining dates)
Nicasio Valley Pumpkin Patch Nicasio — 5300 Nicasio Valley Road Daily through October 31, 2026
Grossi Family Farm Pumpkin Patch Novato — 3666 Novato Boulevard Opened September 26, 2026; Wednesday–Sunday through the season
Halloween Spectacular at Marin Country Mart Larkspur — 2257 Larkspur Landing Circle Saturday, October 31, 2026, 11 a.m.–2 p.m.
Trick or Treat on Fourth Street Downtown San Rafael Saturday, October 24, 2026
Trick or Treat in Downtown Novato Downtown Novato Saturday, October 31, 2026

Our 6 top family Halloween and harvest experiences

1. Goblin Jamboree at Bay Area Discovery Museum

Where: Sausalito — Fort Baker. When: October 10–11, 17–18, 24–25 and 31, 2026 (remaining dates).

Our top family option for young children turns the Bay Area Discovery Museum into a gentle hands-on Halloween world of playful spiders, creative activities, costumes and science. The official museum site lists special tickets, limited discount categories and free parking. Book a date in advance and arrive early; this is not general-admission museum entry.

Check 2026 organizer information →

2. Nicasio Valley Pumpkin Patch

Where: Nicasio — 5300 Nicasio Valley Road. When: Daily through October 31, 2026.

A genuine West Marin farm experience: certified organic pumpkins, seasonal hayrides, farm animals, picnic-style food and a hay maze. Marin Agricultural Land Trust’s current farm roundup says admission is free, but activities and pumpkins are cash-only. Children can enjoy open countryside instead of a high-energy indoor venue.

Check 2026 organizer information →

3. Grossi Family Farm Pumpkin Patch

Where: Novato — 3666 Novato Boulevard. When: Opened September 26, 2026; Wednesday–Sunday through the season.

Grossi Farm is a good neighborhood-scale outing for families who want to select pumpkins and interact with a working farm. The 2026 regional farm guide lists weekday admission as free and weekend admission at $5 for guests age 2 and older. Farm animals, school groups and outdoor terrain mean sturdy shoes and close supervision matter.

Check 2026 organizer information →

4. Halloween Spectacular at Marin Country Mart

Where: Larkspur — 2257 Larkspur Landing Circle. When: Saturday, October 31, 2026, 11 a.m.–2 p.m..

The Marin visitor bureau confirms a costume contest, candy collection at participating shops and the announcement of a giant-pumpkin-guessing contest winner. A shopping district’s compact pedestrian setting is appealing for families who don’t want a full-day theme-park outing. Confirm merchant participation and contest timing at the Mart.

Check 2026 organizer information →

5. Trick or Treat on Fourth Street

Where: Downtown San Rafael. When: Saturday, October 24, 2026.

The county visitor bureau’s October event collection lists this merchant-centered trick-or-treating outing on Fourth Street. This is a local streetscape alternative to ticketed attractions: costumes, neighborhood businesses and an easy walk. Check the merchant association for exact hours and participating stores before going.

Check 2026 organizer information →

6. Trick or Treat in Downtown Novato

Where: Downtown Novato. When: Saturday, October 31, 2026.

Families based in northern Marin do not need to drive to San Francisco for Halloween candy. The Marin visitor bureau lists the downtown Novato trick-or-treat celebration on October 31. Organizers may set participating-store times or distribute treats until supplies run out; verify this locally and arrive with a treat bag.

Check 2026 organizer information →

Before you go

Nicasio can be cool and foggy while Larkspur is warm and sunny. Grossi Farm charges weekend admission but allows free weekday visits. The Sausalito Goblin Jamboree is a ticketed special event and tickets may be required even for members. Avoid scheduling both a long farm drive and a crowded museum on the same day.

Children should be accompanied by adults, and families should check event-specific accessibility, costume guidelines, pet policies and refund rules. Free admission does not always include rides, candy or parking.

Explore the rest of California’s Halloween 2026 guides

Find our California Halloween 2026 statewide county directory, discover the Marin County travel guide, and explore more regional ideas:

Planning a trip? Visit OptionTrip.com.

Official and local sources

California58 Editorial Desk. Cover photo Marius Ciocirlan / Unsplash: illustrative seasonal imagery, not a photo of this year’s event. OptionTrip promotional content is separated from editorial recommendations.

Explore Marin County beyond Halloween

For county-specific communities, public services and local knowledge, visit the Marin County reference profile. You can also browse all California58 travel guides. Halloween 2026 events are seasonal and may change; check each organizer’s current calendar before traveling.

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