6 to 8 p.m.: Frazer
5 to 8 p.m.: Millvale
5:30 to 7:30 p.m.: Reserve
5:30 to 8 p.m.: Etna
6 to 7 p.m.: Butler City, Butler Township, Connoquenessing Borough, Evans City
6 to 7:30 p.m.: Adams, Aspinwall
6 to 8 p.m.: Aleppo, Avalon, Bellevue, Ben Avon, Ben Avon Heights, Brackenridge, Bradford Woods, Cheswick, Cranberry, East Deer, Edgeworth, Emsworth, Fawn, Fox Chapel, Forward, Franklin Park, Hampton, Harmar, Harmony, Indiana Township, Jackson, Kilbuck, Leet, Leetsdale, Marshall, McCandless, Middlesex, O'Hara, Ohio Township, Osborne, Pine, Richland, Ross, Seven Fields, Sewickley, Sewickley Heights, Sewickley Hills, Shaler, Sharpsburg, Springdale Borough, Springdale Township, Tarentum, Valencia, West Deer, West View, Zelienople.
6:30 to 8:45 p.m.: Blawnox
Richland -- Halloween party for ages 4 to 10; 6:30 to 7:30 p.m.; Northern Tier Library, 4015 Dickey Road. Stories, songs, costume parade and more. Registration required. 724-449-2665.
Ross -- Trick-or-Treat at Ross Park Mall; 6 to 8 p.m. Halloween Adventure Train in Center Court.
Brady -- Ghost-story tours; 6 to 9 p.m. today and tomorrow; The Old Stone House, intersection of Routes 8, 528 and 173. Every room of the house will be the "sight" of a different ghost story or play. Free; donations accepted. 724-738-4964.
Pine -- Halloween parade; 6:30 p.m.; Wexford Volunteer Fire Company, Manor Road.
Butler -- Halloween party; 11 a.m. to noon; Butler Area Public Library, 218 N. McKean St. Costume contest, games and snacks. 724-287-1715.
Cranberry -- Wild West Fall Festival for children and families; noon to 3 p.m.; Dutilh United Methodist Church, 1270 Dutilh Road. Games, bounce house, candy and shows. Dress in costume. Free. 724-776-1094.
Marshall -- Halloween parade; 1 p.m.; meet at Marshall Township Fire Station in Warrendale to march to Warrendale Park for activities and refreshments. Dress in costume to participate. in Marshall's Halloween Parade.
Shaler -- Halloween parade; 11 a.m. to 1 p.m.; Shaler Plaza. Ages 2 through 10 may wear Halloween costumes and begin trick-or-treating at Kmart, where free treat bags will be distributed. Participating merchants will give candy to children during those hours. All children must be accompanied by an adult.
Shaler -- Costume ball for adults; 8 to 10 p.m.; Shaler North Hills Library, 1822 Mount Royal Blvd. Live music, games, contests and refreshments. $15 for singles; $25 for couples. 412-486-0211.
Zelienople -- Halloween parade at 2 p.m. on Main Street.
Shaler -- Family harvest festival; 2 p.m.; Shaler North Hills Library, 1822 Mount Royal Blvd. Children may attend in costume. To register, call 412-486-0211.
West View -- Halloween parade; 7 p.m.; begin at Highland Avenue and Perry Highway, along Perry to Center Avenue for goodie bags. Prizes awarded in age and costume categories. Participants must sign up from 6:30 to 8 p.m. Oct. 25 at the borough building.
Aspinwall -- Costume contest; 7:30 p.m.; front of Aspinwall's borough building. Candy will be given out at the fire hall at that time.
Millvale -- Halloween parade; 7 p.m.; starts at Hardee's and marches on North Avenue to Lincoln Avenue, ending at the recreation center for activities.
Valencia -- Congregation members of Valencia Presbyterian Church hand out candy; 6 to 8 p.m.; church parking lot, 80 Sterrett St.