Join Ranger Heidi for an evening gathering under the glow of fairy lights! The beautiful San Geronimo Valley has many secrets to share, from Roy's Redwoods to open meadows.

Join us for an all-day Halloween extravaganza celebrating the spooky season! Come dressed in your costume to explore and discover with special Halloween-themed hands-on science activities.

Run in our annual Halloween Run, where healthy fitness meets frightful fun!

Roll through for sick tricks and sweet treats at our annual Halloween Skate Jam!

This Halloween, our beloved Portola Green in Between transforms into a twilight dreamscape. For one evening only, stroll through glowing sculptures, spectral illusions, and lantern- lit trails woven into the garden's native texture.

Join us for the annual family-friendly block party on Leavenworth Street! The street will be closed to traffic so kids can trick or treat safely while parents socialize.

Child friendly Haunted House, BBQ, trick-or-treat, dog costume contest and more

Celebrate the spookiest time of year with us, if you dare! Roast marshmallows over a fire, build yourself a s’more, pour a cup of warm cider, then settle back and get your spine tingled.

Fairfax kids and parents - come one and all ! -- to the annual downtown parade sponsored by the Fairfax Chamber of Commerce.

The Castro Night Markets event series is a program bringing some much-needed life and community spirit to the Castro. Kicking off in October 2025, with six recurring public events over the next year, the Night Market series will feature local food vendors, merchants, and live entertainment. The event is free and open to the public.

Join us for a spine-tingling Halloween SPOOK-TACULAR EVENT! Explore our Haunted House, spooky Trick-or-Treat Lane, and show off your thrilling costume in our Instagram Costume Contest. Dance the night away to bone-chilling beats from our live DJ. With unexpected surprises at every turn, it's a Halloween celebration you won't forget!

Join us for a spooky stroll through Pioneer Park Cemetery to learn about the history of Novato's first citizens!

On Halloween day, the park becomes a mad science laboratory full of glowing goo, bubbling brews, frightful formulas, and eek-citing experiments!

The days are getting shorter. It's time to ride with a lit pumpkin strapped to your head. Anyone and any bike is welcome, so long as you have a lit pumpkin strapped to your head.

Oh my ghost! Frances Albrier's Annual Halloween Parade and Costume Contest is back to stir up some shrieks in the neighborhood. 

Kids ages 4–12 are invited to join us for a spooktacular Halloween experience!

The Academy Award-winning smash hit Coco (Best Original Song, Best Animated Feature Film) stars a music-loving boy who makes a dazzling journey to the Land of the Dead to reunite with his great-great-grandfather.

Creep, crawl, and cackle your way into a spook-tastic night at Howl-ooo-ween, Lindsay Wildlife Experience's beloved fall celebration for little witches, wizards, and monsters of all kinds! Come in costume* on Tuesday, October 28, from 3-8 p.m. and enjoy not-so-spooky animal encounters, spooktacular crafts, games and activities, a Mad Scientist, face painting, and so much more.

Bring your little ones in costume and trick-or-treat all over the Schulz Museum!

Come and join our amazing Open Space Rangers for an exhilarating and spooky evening!

Join us for Redwood Symphony’s annual Halloween Family Concert — an
afternoon of thrills, chills, and music!

Concerts on the Corner welcomes The Sewer Band also known as The Las Gallinas Sanitary District Non Marching Band for a Halloween Concert.

Your prized and precious pets will have a day for strutting their canine stuff on October 26 at the City Center Howl-O-Ween Costumed Pet Parade.

Celebrate this bewitching holiday with some festive farm games. Join us in the farmyard to compete in our pumpkin playtime!

You are invited to Trick or Treat at the Beach!

Jack London Square is a hosting a FREE Halloween Dia de los Muertos Family Fun Fest event on Sunday, October 27th, from 1:00 PM - 3:00 PM located in the plaza near Plank.

Create and dress up your own Halloween doll. We’ll make them out of clothespins just the way they did more than 100 years ago.

Enjoy an immersive, outdoor Halloween experience at Thrive City in Mission Bay!

Join us for the annual Sunnyvale Halloween Pet Parade and Fair, a fun-filled day for pets, their owners, and animal lovers!