• The Sanctuary of the Evil Haunted House — 7-10 p.m. Friday and Saturday and 7-9 p.m. Sunday. Visit the spider room, wind your way around the corn maze and take "The Last Ride." 936 Carpenter Road, Oakley. Haunted house $5, coffin ride $3, both $7. Proceeds benefit Girl Scout Troop 31437 and Venture Crew 152. Call 925-206-3339 or visit www.sanctuaryofevil.com.

    friday

  • CC Café Annual Halloween Party and Luncheon — 11:30 a.m. today. Best costume contest, door prizes, bingo and lots of goodies. For adults 60 and older. Ambrose Community Center, 3105 Willow Pass Road, Bay Point. $2 donation. Reservations required. Call Deborah Simmons, 925-458-2662, between 9 and 11:30 a.m.

    saturday

  • Pittsburg Halloween Costume Parade — Noon-2 p.m. Saturday. Wear your costume to the farmers market for some spooky fun and treats. Parade runs between Fifth and Sixth streets. Call 925-432-7301 or visit www.pittsburgchamber.org.

  • Circus Hallelujah Night — 6-9 p.m. Saturday. Food, rock climbing wall, hay rides, carnival games, jumpy houses, pony rides and more. Special area for children 5 and younger. Bikes given away every 15 minutes. Sponsored by Harvest Time Church, 2200 Ventura Drive,
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    Brentwood. Free and open to all. Call 925-516-1908.

  • Halloween on Hollow Hills — 1-4 p.m. Saturday. Have a frighteningly good time at this festive event featuring games, crafts, scavenger hunts and more. Learn the history of the hills and meet some of the park's creepiest creatures. Black Diamond Mines Regional Preserve, 5175 Somersville Road, Antioch. Parking fee $5. Call 510-544-2750.

  • Halloween Spooktacular — 10 a.m.-2 p.m. Saturday. Enjoy a free movie at the Brenden Theatres, kids rides, face painting, balloons, free pumpkins for the first 200 children in costume, trick-or-treating and the Tri Delta Transit Haunted Bus. Presented by Sierra Pacific Properties, Brenden Theatres, Tri Delta Transit and Pittsburg Chamber of Commerce. Century Plaza Shopping Center between Brenden Theatres and Burlington Coat Factory. Call 925-432-7301 or visit www.pittsburgchamber.org.

  • Holy Eve Carnival — 5-9 p.m. Saturday. Food, concerts series, carnival rides, rock-climbing wall, roller skating, pony rides and more. Sponsored by Grace Bible Fellowship of Antioch. Contra Costa Fairgrounds, 1201 W. 10th St., Antioch. This is a free event open to all. www.gbfofantioch.org.

  • Antioch Historical Society Museum Trick or Treat — 1-4 p.m. Saturday. Bring your children in costume for trick-or-treating through the rooms of the museum. 1500 W. Fourth St. Call 925-757-2409.