THURSDAY HAUNTED GHOST WALK: The Mathews Museum will hold a Haunted Ghost Walk, with tours leaving every 30 minutes from 7-8:30 tonight, Friday and Saturday at 200 Main Street Mathews. The cost is $15 cash or $16 card at the door. SATURDAY HALLOWEEN: The Fairfield Foundation will have a Halloween celebration from 10 a.m. to 2 p.m. Saturday at Fairfield Archaeology Park, 5777 Fairfield Lane, Hayes. Dress up and enjoy blending excavation with oral histories, folklore, and discussions of colonial and Revolutionary-era beliefs and superstitions. HARVEST FESTIVAL: The Mathews Farmers and Artisans Market and the Mathews Museum will have the Mathews Harvest Festival Extravaganza from noon to 4 p.m. Saturday on the historic court green at Court Street. Refreshments, face-painting, games, pumpkin-painting and a costume contest. Free and open to the public. BOO ON THE BAY: Boo on the Bay, a Hall of Horrors Trick-or-Treat event, will be held from 4-7 p.m. Saturday at Thomas Hunter Education Cente...