Walking Ghost Tours
When, where: Fridays and Saturdays in October, meet in front of the Pacific Hotel
Highlights: Explore downtown Yakima's historic buildings, including the Capitol Theatre and the onetime train depot, with paranormal investigators who narrate visitors through the supposedly haunted sites.
Cost: Free; reservations are recommended.
Info: (509) 945-9830, http://www.pastispresent.net
New Haunted Tales of the Ship
When, where: Oct. 9, 16 and 23, Maritime Museum of San Diego
Highlights: Take a lantern-led tour aboard the world's oldest active ship, the Star of India, while hearing eerie tales of the vessel's past. Halloween-themed treats lighten the mood.
Cost: Included with $14 museum admission; $11 for active military and ages 62 and older; $8 for ages 6 to 17; free for ages 5 and younger; slight discounts for buying advance tickets online.
Info: (619) 234-9153, http://www.sdmaritime.org
Welcome Back Monarchs Day
When, where: Oct. 10, Natural Bridges State Beach
Highlights: 10-10-10 at 10 a.m. marks the 30th anniversary of this event, the celebration of the return of Santa Cruz's migratory monarch butterflies. Festivities include kids' activities, handmade "monarch" (pumpkin) ice cream, educational booths and instruction about how to create a butterfly garden.
Cost: Free; parking costs $10 a vehicle.
Info: (831) 423-4609, http://www.santacruzstateparks.org
HALF MOON BAY, CALIF.
Art & Pumpkin Festival
When, where: Oct. 16 and 17, Main Street
Highlights: This annual celebration is the world pumpkin capital's signature event. It features the Great Pumpkin Parade, a haunted barn, pie-eating and costume contests, crafts, food and live music.
Info: (650) 726-9652, http://www.miramarevents.com
Historical Haunted Walking Tour
When, where: Oct. 21 and 22, meet at Moody's Bistro & Lounge
Highlights: During this second annual event, guides lead visitors (ages 21 and older) through spooky places, including the Old Jail Museum and the Richardson House, while regaling attendees with historic lore.
Cost: $25, including a glass of wine; proceeds benefit local nonprofits