EVENT LISTINGS ARE CHECKED AT THE TIME OF POSTING BUT SCHEDULES MAY CHANGE WITHOUT NOTICE. LINKS ARE AVAILABLE BELOW TO ALL VENUES FOR YOUR CONVENIENCE. PLEASE CONFIRM INFORMATION WITH THE WEBSITE. — *EVENT LISTINGS ARE CHECKED AT THE TIME OF POSTING BUT SCHEDULES MAY CHANGE WITHOUT NOTICE. LINKS ARE AVAILABLE BELOW TO ALL VENUES FOR YOUR* *CONVENIENCE. PLEASE CONFIRM INFORMATION WITH THE WEBSITE.*

Friday, October 23

Preschool Discovery Lab, 11a-12p, ages 3-6, South Novato Library.

Halloween Music and Magic Show, ages 3+, Two Shows! 4pm and 6:30pm, Mill Valley Community Center.

Tam Valley Haunted House, Nightmares, Face Your Fears, 3:30-4:30pm Not scary for under 8, 5-6:30pm Scary Over 9, 7:30-9pm HORRIFYING, Mill Valley.

Trunk or Treat at the Center, 4:30-6pm, free, Bring your children to the Community Center Parking Lot for a fun, safe and community Halloween event! Face painting, Food Truck, Treating, Games & more! Mill Valley Community Center.

Kiddo! Reception, 5-7p, refreshments served, SweetE, Mill Valley.

Scare Grove, 3-9p, mobile rec event including climbing wall, Stern Grove, San Francisco.

Super Natural Halloween Party, 6:30-9pm, Grab your costume and have yourself a ghoulishly great time trick-or-treating your way through the Academy at night—among spooky skulls and spine-tingling specimens! California Academy of Science.

Tested: The Show, 7-9pm, Teens, Adam Savage, Will Smith, and Norman Chan bring to stage visions of the past, present, and future as seen through the eyes of makers, tickets $15-$35, Castro Theatre, San Francisco.

Halloween House Workshop, 12-1pm, Pre-registration required at habitotreservations@lmi.net, Habitot, Berkeley.

Saturday, October 24

Southern Marin Mother's Club Consignment Boutique, 10am-4pm, Baby & Children's previously loved clothing, toys, books, nursing gear, furniture, strollers, carriers, bikes, maternity wear and more to benefit Drawbridge, Mt Tam High School Student Center.

Mountain School Apple Faire, 10am-1pm, ages 3-7, Carnival games, Prizes, Puppet Show, Fairy-Gnome maze, Kid-friendly crafts, gourmet sandwiches from Farm House, Apple home-baked treats and a cake/pie raffle, 50 El Camino Dr., Corte Madera.

Scream on the Green Faire, 10am-5pm, "Chamber of Horrors" Haunted House, Costume Contest, Music, Artisan Booths, Children's Play Area, Food & Beverages, Novato.

Junior Chef Class, 10am, ages 5–13, Halloween Party, Williams-Sonoma, The Village at Corte Madera.

Plankton Discovery, 10-11:30am or 1-2:30pm, ages 4-8, explore the weird and wonderful world of plankton in the waters just off Crissy Field. Be dazzled by diatoms, dinoflagellates and copepods. Discover bizarre larvae from barnacles, crabs and mussels. Participants get their own samples and use their own microscopes. Contact Mark Oates at (321) 332-2399 or mark.oates@noaa.gov to reserve a spot! 991 Marine Drive, The Presidio, San Francisco.

Kids' Turn: A Workshop for Families Experiencing Seperation and/or Divorce, 10:30-12p, Parents Place, San Rafael.

Twin Cities Co-op Halloween Carnival, 10am-2pm, fun children's activities, including face painting, carnival games, cake walk, arts & crafts, photo booth, used costume sale and much, much more, Corte Madera.

Horse Hollow, 11am-4pm, free, visit our special horses, horse painting for Halloween, participate in games, activities, BBQ and a special horse performance, Presidio Riding Club, Marin Headlands-Fort Barry, 901-Bunker Road, Sausalito.

Marincello Walk, 11am, Marin Headlands.

Halloween Storytime: Click, Clack, Boo! 11am, come in costume for this Halloween Storytime with fun-filled giveaways and activities, Barnes & Noble, Corte Madera.

Safe Trick or Treat, 11am-2pm, Downtown Novato.

Downtown San Rafael Trick or Treat, 1-3pm.

LEGO Club, 1-2p, Belvedere Tiburon Library.

Halloween Ghost Craft, 2-3pm, make a mini ghost, Civic Center Library.

Dogtoberfest! 3-6pm, free activities for you and your pooch, Strawberry Village, Mill Valley.

Tam Valley Haunted House, Nightmares, Face Your Fears, 3:30-4:30pm Not scary for under 8, 5-6:30pm Scary Over 9, 7:30-9pm HORRIFYING, Mill Valley.

DIY Halloween! 1-6p, an afternoon of awesome projects, spooky treats, and all sorts of weird other stuff. Meet the Mods, earn some real patches, and wear your best costume for a chance to win a toolbag full of cool stuff! RSVP required, San Francisco.

Wharf Fest, 11am-6pm, enjoy music and live entertainment, food and wine, a chowder competition, children’s rides, ship tours, street performers, art, fireworks, and more, Fisherman’s Wharf, San Francisco.

Family Matinees, ages 5-12, provide a window into the exciting world of live jazz and feature amazing artists from around the globe! This month is Zakir Hussain, SF Jazz Center, Miner Auditorium, San Francisco.

Bay Area Discovery Festival, 1:30p-3p, free, Explorer Days, Back in Time, Sea Level Rise, Bay Model, Sausalito.

Strawberry Village Trick-or-Treat, 3-6, Howl'oween Pet Costume Contest, 5-6pm, Mill Valley.

Headlands Nightlife: Family Night Hike & Campfire, 6–8:30pm, join us for a night hike to Rodeo Beach in search of bioluminescent plankton twinkling in the sand, NatureBridge, Sausalito.

Graveyard Stroll, 7 – 8:30pm, Experience our one-of-a kind program that uncovers one of Marin’s most interesting, but little known cemeteries. All treats (and tricks) are free. Meet at the Marin County Parks Lucas Valley Field Office in San Rafael (18 Jeannette Prandi Way).

Boo at the Zoo 10am-3pm, Stroll the Zoo in costume and collect yummy treats. Ride the spooky boo train and join the dance party. Plus, get your face painted, make treats for the animals, and see how the animals at Oakland Zoo celebrate Halloween. Kids in costumes receive a free ride ticket. Oakland Zoo.

Boo at the Zoo, 11am-4pm, a "not-too-spooky" Halloween family festival where you can trick-or-treat around the Zoo and see the animals enjoy pumpkin treats. Get your monster mash on at the special Halloween themed Baby Loves Disco dance party at the Playground and take a trip through the Haunted Nature Trail to celebrate! San Francisco Zoo.

Hound of the Baskervilles- Sherlock Holmes, Young Performers Theatre, Fort Mason, San Francisco.

Chitty Chitty Bang Bang, 11am & 2pm, ages 4+, Children's Creativity Museum, San Francisco.

Family Matinee, 11am, The Music of Michael Jackson, SFJAZZ Collective.

Bay Area Discovery Festival, 10:30a-4p, free, North Bay Discovery Day, Sonoma County Fairgrounds.

Bay Area Discovery Festival, 10:30a-4p, free, East Bay Discovery Day, Cal State East Bay.

Bay Area Discovery Festival, 9a-12p, free, ages 5-14, Explore! Discover! Create! CSU East Bay, Concord.

Bay Area Discovery Festival, free, Aero Challenge, engineering design process with a series of Museum-based, aerodynamics-themed inspiration experiences, then launches them into a mission to design, test, and present a prototype of an engineering vehicle designed to meet a specific design requirement, space is limited, Hiller Aviation Museum.

Jack O’Lantern Jamboree, Children's Fairyland, Oakland.

Pumpkins on Pikes, Tara Firma Farms, Petaluma.

Halloween House Workshop, 9:30-10:30am, Pre-registration required at habitotreservations@lmi.net, Habitot, Berkeley.

Skeletonfest, 1-3pm, make sugar skulls, screen print a T-shirt or flag (bring your own clothing or fabric), make a cool or scary mask, and enjoy the Dia de Muertos decor and snacks throughout the Art Center! New this year: Make pom-pom skulls and eyeballs, Richmond Art Center.

Tolay Fall Festival, old-time, nature-based fun, Petaluma.

Howl-o-ween, they also have a Kid Zone, The Treasure Island Flea.

Big Surprise & Reflections + Perceptions Exhibition Opening, 9:30am-5pm, explore new, ten-piece sensory exhibition that will enable exploration of visual and tactile perception. Enjoy super-sized science activities all day long, help create a crowdsourced mural, meet resident furry creatures, and get lunch from food trucks. CuriOdyssey, San Mateo.

Sunday, October 25

Tour for the Stewards, 10a-1p, Muir Woods.

Marine Science Sunday, 10am-5pm, takes a look at Creatures of the Deep. Join us for classroom presentations, Docent-led tours, and more! Marine Mammal Center, Sausalito.

Scream on the Green Faire, 10am-5pm, "Chamber of Horrors" Haunted House, Costume Contest, Music, Artisan Booths, Children's Play Area, Food & Beverages and Safe Trick or Treat from 11a-2p, Downtown Novato.

Papermill Creek Halloween Carnival, 10am, Games, pony rides and children’s activities along with the Chef-Off tastings from local restaurants. A huge silent auction with bargains galore – all to support Papermill children! Dance Palace, Point Reyes Station.

Jeepers Jack-O-Lanterns, 11am – 1pm, Join ranger staff at Paradise Beach Park in carving your own spooky Jack-O-Lantern for Halloween! A limited amount of pumpkins will be available (or you’re welcome to bring your own). Paradise Beach Park, 3450 Paradise Dr, Tiburon.

WOW! Halloween Faire, 11am-12:30pm, Come in costume to celebrate All-Hallows-Eve with other wizards, witches, ferries, astronauts and cartoon characters. Play carnival games, bounce in the jump house, enjoy the candy & prize hunt and costume parade!

Hawk Talk & Banding Demo, 12-2pm, Hawk Hill, Sausalito.

Trick-or-Treating, 12-3pm, Town Center, Corte Madera.

Tam Valley Haunted House, Nightmares, Face Your Fears, 3:30-4:30pm Not scary for under 8, 5-6:30pm Scary Over 9, 7:30-9pm HORRIFYING, Mill Valley.

Muir Woods After Dark, 5:30-7:30pm, ages 8+, Reservations required; call (415) 388-2596.

Shadow Puppet Show, 10:45a, Experience a thrilling live show with the shadow puppet master behind Sean’s Shadows, and stick around to make your own puppets. California Academy of Science.

Spectacular Halloween Party & Trick or Treat, 1-5p, Japantown, San Francisco.

Hound of the Baskervilles- Sherlock Holmes, Young Performers Theatre, Fort Mason, San Francisco.

Explorer Days – Wonders of the Parasite World – a Global Tour, 1-2pm, 600 16th St, Byers Hall Room 509 San Francisco.

Chitty Chitty Bang Bang, 11am & 2pm, ages 4+, Children's Creativity Museum, San Francisco.

Fiesta on the Hill, 10a-4p, music, dancing in the street, street artists, pumpkin carving, petting zoos, a wide variety of food and more, Bernal Heights, San Francisco.

Magic Flute, San Francisco Opera.

Explorer Days – Plant Biology Lab, 1-2p, Zambryski plant microbiology lab at UC Berkeley.

Tolay Fall Festival, old-time, nature-based fun, Petaluma.

Howl-o-ween, they also have a Kid Zone, The Treasure Island Flea

Days of the Dead Community Celebration, 11am–4:30pm, featuring main stage performances ranging from contemporary popular music to folkloric dance, Mariachi to Aztec dance. An artisanal mercado featuring traditional and contemporary apparel, craft, artwork, and food. A selection of festive food highlighting the Bay Area’s diversity of cuisines will be avaiable for purchase from Off the Grid, and Bike East Bay will provide a bike valet service.

Jack O’Lantern Jamboree, Children's Fairyland, Oakland.

Explorer Days- Paleontology and Geology at New Brighton State Beach, 2:30-4:30p.