Here’s where walking watermelons, pirate gypsies, and Harry Potter look-alikes can go for fall fun and, of course, serious sweet loot.

Santa Rosa: Blind Scream Haunted House This haunt is thoroughly invested in being as scary as possible. Its high fear factor is why parents must accompany anyone ages 12 and younger. Admission is $25–$35, and it runs Oct. 13–31, at the corner of A Street and First Street. Find a schedule of days and times at blindscream.com/calendar. 

Cotati: Cotati Candyland Trick-or-Treat Local businesses can’t make Candyland’s ice cream cone castles, but they can and will hand out free goodies October 31, 2–5 p.m. Meet at La Plaza Park for a map of participating merchants. See facebook.com/events/3993561084203872.

Petaluma: Halloween Trick-or-Treat Trail Follow the orange and black balloons to Reese’s Pieces and candy corn at this annual free event, where pirates and princesses (and princess pirates) reign. Download the trick-or-treat map or just follow the costumed crowd on October 31, 3–5:30 p.m., to downtown merchants with goodies. Learn more at petalumadowntown.com/trick-or-treat-trail.

Guerneville: Halloween Open House A free book is the treat costumed kids get when they come to the Guerneville Library on October 31, 4–6:30 p.m. They can also paint pumpkins, make buttons, and draw and color. For details, go to tinyurl.com/yz5tnnx3. 

Santa Rosa: Happy Halloween, Charlie Brown Kids ages 1–5 can explore a spooky sensory bin, create a pompom pumpkin path—and trick-or-treat in the land of Peanuts, too—at this Charles M. Schulz Museum event. The crafts and treats happen on October 30, 10 a.m.– noon, with a screening of the classic 1966 animated film It’s the Great Pumpkin, Charlie Brown! at 11:45 a.m. Admission is $10 per child and free for up to two adults per child before 11 a.m. (regular museum admission applies thereafter: $5–$12, free for ages 3 and younger). Get details and sign up at schulzmuseum.org/museum-mondays/#toggle-id-2.

Santa Rosa: Downtown Fall Fun Fest On October 27, bust a freaky move at Old Courthouse Square at this free DJ’d party, which will feature not just trick-or-treating at Fourth Street merchants, but also rides on a Ferris wheel. Festivities run 5–8 p.m. but trick-or-treating starts at 4 p.m. Find out more at tinyurl.com/yc2w7abw. 

Santa Rosa: Sonoma County Zombie Movement Walk & Trunk-or-Treat Arrive “zombified” and ready to lurch, crawl, and shamble through downtown at this charity event, which benefits the ASPCA and other nonprofits. The dead will rise again (and even compete for best costume) at Old Courtyard Square on Oct. 21, 2–6 p.m. Find details and purchase tickets, which are a $10–$25 donation, at tinyurl.com/mrxu5xrv. 

For more Halloween fun, check out the Calendar of Events.