Marin County transforms into a Halloween fest each October, offering a delightful mix of family-friendly festivities, spine-tingling thrills, and pumpkin-spiced charm. Whether you're a parent seeking safe trick-or-treating spots, a pet lover eager to showcase your dog's costume, or someone looking for a classic haunted parade, Marin has something for everyone. Here's your go-to guide to the best Halloween events in Marin this fall.

Safe Trick-or-Treating in Downtown Novato

When: Saturday, October 25, 2025, from 11:00 AM to 2:00 PM
Where: Downtown Novato, CA
Details: Bring your little ghosts and goblins to stroll down Grant Avenue and collect treats from participating downtown businesses. This family-friendly event ensures a safe and fun environment for all ages.
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Howl-o-Ween Dog Costume Contest

When: Sunday, October 26, 2025, from 10:30 AM to 11:30 AM
Where: Mill Valley Lumber Yard, 129 Miller Avenue, Mill Valley, CA
Details: Calling all pups and their humans! Dress up your furry friend in their most creative and outrageous costume and join the third annual Howl-o-Ween Dog Costume Contest. It's a tail-wagging good time for all pet lovers.
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Halloween Parade & Haunted Grove in Fairfax

When: Friday, October 31, 2025, from 5:00 PM to 8:00 PM
Where: Fairfax Theater, 9 Broadway, Fairfax, CA
Details: Join over 500 costumed revelers as the parade kicks off at 5 PM in front of the Fairfax Theater. The procession winds through town, leading to the Haunted Grove in Bolinas Park, featuring music, contests, and plenty of treats.
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Marin Country Mart Halloween Festival

When: Friday, October 31, 2025, from 4:00 PM to 7:00 PM
Where: Marin Country Mart, Larkspur, CA
Details: Celebrate Halloween with trick-or-treating at the shops, crafts, temporary tattoos, a kid’s costume contest at 5:00 PM, and a screening of Monsters, Inc. at 6:00 PM. It's a festive evening for all ages.
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Sausalito Halloween Parade & Events

When: Friday, October 31, 2025, from 5:00 PM to 8:00 PM (drop-off for the carved pumpkin contest begins around 5:00 PM)
Where: Robin Sweeny Park and Caledonia / Johnson Streets, Sausalito, CA
Details: Join a fun evening of Halloween magic in Sausalito: there’s a carved pumpkin contest where you can vote on your favorite pumpkin, gather for the parade from the Station 1 Firehouse on Johnson & Caledonia Streets, and after the parade, head to the Trick-or-Treat Lane at Robin Sweeny Park’s basketball courts for candy, fun and community spirit. There’s also a dog costume contest at 6:30 PM, dress up your pup and join in the fun!
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Nicasio Valley Pumpkin Patch – A Farmstead Family Tradition

When: Daily through Sunday, November 2, 2025
Where: 5300 Nicasio Valley Road, Nicasio, CA
Details: Experience classic fall fun at this beloved pumpkin patch. Enjoy hayrides, farm animals, bounce houses, live music, and a 12-acre pumpkin field. It's the perfect spot for family photos and autumn memories.
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From safe trick-or-treating in Novato to the spirited parades across the county, there's no shortage of spooky fun in Marin. Embrace the season, wear your favorite costume, and make this Halloween one to remember in Marin County!

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