Following is a list of gruesome events to shiver your spine this Halloween weekend. HAUNTED HOUSES MARYLAND

BOWIE, Jaycees, Friday, 7 to 10, Saturday, 1 to 4 and 7 to 10, Sunday, 4 to 8. Market Place Shopping Center, on Route 450, Bowie. Adults $2.50, under 13 $1.50. Call Denis Gillen, 464-0722.

FOREST HEIGHTS, Monster Mansion, Friday to Sunday, 7 to 11, Municipal Building, 5508 Arapahoe Drive. Admission $1. Call 248-1260.

FORT WASHINGTON, Halloween Maze, Friday to Sunday, 6 to 10, Count Forgione's Monster Mansion, 12909 Van Buren Drive. Admission $2. Call 292-2992.

GOOD LUCK COMMUNITY CENTER, Haunted House, Saturday and Sunday, 6:30 to 9:30, 8601 Good Luck Road, Lanham. Admission $1.50, adults accompanied by children are free. Call 552-1093.

WATKINS REGIONAL PARK, Haunted Farm, Friday to Sunday, 7 to 11, 301 Watkins Park Drive, Upper Marlboro. Adults $3, under 13 $2. Call 249-7200, Friday from 9 to 4. VIRGINIA

ALEXANDRIA, Jaycees, Friday, 6:30 to 10:30, Saturday and Sunday, 5:30 to 10:30, Chinquapin Center, 3210 King Street. Adults $2.25, under 13 $1.75. Call 838-4343.

BOWMAN HOUSE REC CENTER, Haunted House, Friday and Saturday, 6:30 to 9, 211 South Center Street, Vienna. Admission $1. Call 938-8000.

COLVIN RUN MILL, Haunted Mill, Friday 7 to 9, five miles west of Tysons Corner on Route 7. Adults $3, under 16 $1.50. Call 759-2771.

HUNTLEY MEADOWS PARK, Saturday, 7 to 9, 6901 South Kings Highway, Hybla Valley. Free. Call 768-2525.

MdEAN COMMUNITY CENTER, Haunted House, Friday, 6:30 to 9, 1236 Ingleside Avenue. Admission 50 cents. Call 790-9248.

NOTTOWAY PARK, House of Horrors, Friday and Saturday, 7 to 9, 9601 Courthouse Road, Vienna. Admission $1. Call 938-7532.

SUGARLAND RUN, Jaycees, Friday to Sunday, 7 to 10, Sugarland Community Center, Sterling. Adults $2, under 16 $1. Call 430-1992. ADULT SOCIAL SPOOK SCENE

HALLOWEEN DANCE, Friday, 8 to midnight, Saint Leo's School Hall, 908 Stiles Street, Baltimore. Admission $3.50. Call 301/659-6829 or 301/675-7271.

MARDI GRAS HALLOWEEN, Friday, 9 to 2 a.m., Lansburgh Cultural Center, 420 Seventh Street NW. Live entertainment, prizes, movies and cash bar. Call 347-9223.

COSTUME DISCO BALL, Friday, 10 to 2 a.m., Saints Paul and Augustine Church, 1421 V Street NW. Admission $6. Call 265-1470.

MARQUEE LOUNGE PARTY, Friday and Saturday, 9 to 2 a.m., Shoreham Hotel, Calvert Street and Connecticut Avenue NW. Admission $3. 234-0700.

HALLOWEEN PARTY, Saturday, 6 to 1 a.m., Maryland Science Center, Inner Harbor, Baltimore. Senior citizens and students $2, adults $3, under 12 $1.50. Call 301/685-2370 or 301/685-5225.

HARVEST MOON MASQUERADE, Saturday, 8:30 to midnight, Wintergreen Resort, 43 miles southwest of Charlottesville, Virginia. Call 804/325-2200.

MASQUERADE BALL, Saturday, 9 to 1 a.m., Gaithersburg Holiday Inn, Montgomery Village Avenue and Route 355. Residents $6, nonresidents $8. Call Janet Gonchar, 948-3220.

COSTUME PARTY, Saturday, 9 to 2 a.m., Capital Children's Museum, 800 Third Street NE. Admission $25 per person. For reservations, call 429-0325.

MASKED MADNESS, Saturday, 10 to 2 a.m., Palmer Park Community Center, 7720 Barlowe Road, Maryland. Admission $2.50. Call 773-5665 or 386-3726.

GREAT PUMPKIN COSTUME PARTY, Saturday, 6 to midnight, Sunday, 1 to 6, 105 King Street, Old Town, Alexandria. Cash prizes for the best and most original costumes. Free. Call Carol Huebner, 683-1135.

GALA AND MASQUERADE BALL, Sunday, 7 to midnight, Wax Museum, Fourth and E streets SW. Live entertainment, Fashion show and cash prizes for best costumes. Admission $10. Call 889-5100 or 889-4712. CHILDREN'S HALLOWEEN TREATS

FIENDISH FROUCS, Friday, 9:30 to 3, Fort Dupont Activity Center, Minnesota Avenue and Randle Circle SE. Face-painting, games, storytelling and candy-apple making. Free. Call 426-7723.

PLAYSKOOL PARTY, Friday, 10:30 to 11:30, Trinity Episcopal Church, 14515 Church Street, Upper Marlboro. For ages 3 1/2-5.Free. Call Gamee Elliott, 248-1260 or Brenda Harhai, 627-3936.

GHOST TRAIN RIDES, Friday, 11 to 4, Burke Lake Park, 7315 Ox Road, Fairfax Station. Admission for those not in costume. Call 323-6600.

COSTUME PARTY, Friday, 3:30 to 6, Lynnbrook Elementary, 8001 Lynnbrook Drive, Bethesda. Free. Call 986-8947.

GHOST STORIES, Friday, 4 to 5, Burke Branch Library, 4701 Seminary Road, Alexandria. Free. Call 838-4598.

COSTUME CONTEST, Friday, 6, Annapolis Mall, at the intersection of Routes 450, 178 and 50, Maryland. Free.

HALLOWEEN CARNIVAL, Friday, 6 to 9, Belle View Elementary, 6701 Fort Hunt Road, Alexandria. Haunted house, costume contest, face-painting and moon bounce. Fee for various activities. Call 660-9241.

COSTUMES AND MAGIC, Friday, 7 to 9, Gaithersburg Community Center, 810 South Frederick Avenue. Magic show and costume contest for ages 7-12. Free. For reservations, call Janet Gonchar, 948-3220.

MAGIC AND ENCHANTMENT, Friday, 7 to 9:30, Twinbrook Elementary, 5815 Wainwright Avenue, Rockville. Hal Diamond performs magic, costume contest. Free. Call 424-8000, ext. 350.

HALLOWEEN FESTIVAL, Friday and Saturday, 7 to 9, Gaithersburg Community Center, 810 South Frederick Avenue. Magic show, costume judging and spook house. Friday, ages 7-12; Saturday, ages 3-6. Free. For reservations, call 948-3220.

RADIO TALES, Saturday, 8 to 9, WPFW, 89.3 FM. A collage of scary stories, songs and poems. Call in after the show, 234-4136.

MOUNT VERNON MERRIMENT, Saturday, 10 to 3, Stephen Foster Intermediate School, 2500 Collingwood Road, across from Mount Vernon Hospital. Workshops, spook tales, magic and clowing. Small fee for various events. Call 780-6635.

HALLOWEEN SCREEN, Saturday, 11, Hirshhorn Museum, Independence at Eighth Street SW. "Ichabod and Mr. Toad" and "The Legend of Sleepy Hollow." Free. Call 357-2700.

PARTY AND LUNCHEON, Saturday, 11 to 3:30, Church of the Ascension, 630 Sligo Avenue, Silver Spring. Costume making, games, mine, dancers, music and plays. Free. Call 588-5585.

PUPPET SHOWS, Saturday, 11, 1, 3, and 5, Landover Mall, Landover and Brightsead Roads, Maryland. Free. Call 341-3200.

MAGIC SHOW AND PARTY, Saturday, noon to 2:15, Stephen Decatur Community Center, 8200 Pinewood Drive, Clinton. Costume contest, magic show, games and treats. Admission $1. Tickets must be picked up Friday at the Center. Call 297-4648.

ALL HALLOWS FESTIVAL, Saturday, noon to 3, Congressional Cemetery, 1801 E Street SE. Costume parade, live music and carnival rides. Free. Call 543-0539.

PUMPKIN-CARVING CONTEST, Saturday, 1 to 3, Ramsay Nature Center, 5700 Sanger Avenue, Alexandria. Admission $2.50, includes 15-pound pumpkin. Call 838-4829.

PARADE AND PARTY, Saturday, 1 to 3:30, White Flint Mall, on Rockville Pike in north Bethesda. Spook house, costume contest and games. Free. Call 652-2249.

TRICKS AND TREATS, Saturday, 1 to 4, Stonehouse Community Center, 8775 Cloudleap Court, Columbia. Music, costume contest and games. Admission $2. Call 301/730-8113.

GEORGETOWN PARK HALLOWEEN, Saturday, 1 to 5, Georgetown Park Mall, 3222 M Street NW.Costume contest and treats. Free. Call Rita Abraham, 342-8190.

PUMPKINS AND A PLAY, Saturday, 1:30 to 3:30, Montessori School of Northern Virginia, 6820 Pacific Lane, Annandale. Pumpkin carving, apple-bobbing, hayrides and "A Dragon Play." Free. Call 256-9577.

HOBGOBLINS, Saturday, 2 to 3:30, Laurel Armory Community Center, 422 Montgomery Street.Costume and Jack-O-Lantern contests and goody bags. Free.Call 725-7800.

GAMES AND CONTESTS, Saturday, 2 to 4, India Queen Recreation Center, 9551 Fort Foote Road, Fort Washington, Maryland. For elementary-school-age children. Admission 50 cents. Call 248-1260.

HALLOWEEN HAPPENINGS, Saturday, 2 to 4, Potomac Landing Community Center, 12500 Fort Washington Road, Fort Washington, Maryland. Horror video tapes, costume contest and treats. Admission $1, parents free.Call 292-9191.

KIDDIE DISCO, Saturday, 2 to 6, Saint Benedict the Moor Church, 320 21st Street NE. Music, costume contest, apple-bobbing and peanut relay. Admission $3. Call 397-4686.

GHOULISH GATHERING, Saturday, 3 to 5, Veterans Memorial Park Center, 14300 Featherstone Road, Woodbridge, Virginia. Movies, goody bags and costume contest for ages 3-12. Admission $2. Call 703/491-2183.

CARNIVAL, Saturday, 5:30 to 7:30, Capital Children's Musuem, 800 Third Street NE. Mask-making, face-painting, spook house and magic show. Admission $2. Call 543-8600.

JACK-O-LANTERN CONTEST, Saturday, 6, Landover Mall, Landover and Brightseat roads, Maryland. Free. Call 341-3200.

COSTUME CONTEST AND MOVIES, Saturday, 6 to 8, Ben Lomond Community Center, 10300 Sudley Manor Drive, Manassas. Admission 50 cents. Call 361-7126.

ALL HALLOWS' EVE CELEBRATION, Saturday, 6 to 9:30, Magruder Park, 40th Avenue and Hamilton Street, Hyattsville. Costume parade, haunted house, bonfire and movies. Free. Call 927-1689.

COSTUME CONTEST, Saturday, 6:15 to 8:15, Fairfax City Hall, 10455 Armstrong Street. Free. Call Brenda Swift, 385-7858.

HAY RIDE, Saturday, 7 to 10, Frying Pan Park, 2709 West Ox Road, Herndon. For ages 5-12. Admission 50 cents. Call 437-9101.

GHOST SEARCH, Saturday, 7:30 to 9, Meadowside Nature Center, 5100 Meadowside Lane, Rockville. Hike to the old graveyard in the park. Free. For reservations, call 924-4141.

COSTUME CONTEST, Sunday, 1:30, Prince Georges Plaza, 3500 East West Highway, Hyattsville. Prizes awarded. Free. Call 559-8383.

DRESSED TO KILL, Sunday, 4 to 6, Lee District Park, 6601 Telegraph Road, Fairfax. Costume contest, candy apples, popcorn and balloons. Admission 50 cents. Call 922-9840.

GHOSTS AND GOBUNS, Sunday, 6 to 8:30, Wakefield Recreation Center, 8100 Braddock Road, Annandale. Spook walk and costume contest. Admission 50 cents. Call 321-7080. HALLOWEEN HODGEPODGE

ORIGINS OF HALLOWEEN, Friday, 7:30 p.m., Library of Congress, Whittall Pavilion. A lecture followed by festive foods and celebratory events. Free. Call 287-6590.

THE LEGEND OF SLEEPY HOLLOW, Friday, 7:30, Saturday and Sunday, 2, National Portrait Gallery, Eighth and F Streets NW. Catholic University's University Players. Free. Call 357-2920 or 357-2137.

DRACULA, Friday, 8, Saturday, 2:30 and midnight, Gunston Arts Center, 2700 South Lang Street, Arlington. Performed by the Fairlington Players. Adults $4.50, students and seniors $3.50. For reservations, call 354-3851.

HALLOWEEN HORRORTHON, Friday and Saturday, 301 Drive-In, U.S. Route 301, Waldorf, Maryland. "He Knows You're Alone." "A Stranger is Watching," "The Beast Within," "Deadly Blessing" and "Motel Hell." Movies begin at 7:30 and continue until dawn. Admission $4, $3 for those arriving at 6:30. Call 843-6280.

BALTIMORE INSOMNIAC TOUR, Saturday night (Sunday 1 a.m.), Maryland Science Center, Inner Harbor, Baltimore. This middle-of-the-night tour includes a visit to Edgar Allans Poe's grave in the Westminster Graveyard, the Yogi Magic Mart for illusions and magic, the Streetcar Museum for rides on the turn-of-the-century streetcars and a finale at the Top of the World Trade Center to view the sunrise. $28 per person. For reservations, call 301/653-2998.

DR. JEKYLL AND MR. HYDE, Saturday and Sunday, 1 and 3, Woodrow Wilson House, 2340 S Street NW. The 1920 silent version with John Barrymore. Admission $2, includes house tour at noon and 2.

FILM FESTIVAL, Sunday, 4, 6, 8, 10, American University, Mary Graydon Center, Mark Wechsler Theater, Massachusetts and Nebraska Avenue NW. "The Fearless Vampire Killer" and "Theater of Blood." Admission $2, $1 for those in costume. Call 686-2103.

CREATURE FEATURES, Sunday, 7:30, National Air and Space Museum, Langley Theater, Independence Avenue and 6th Street SW. Two Val Lewton films, "I Walked With a Zombie" and "Cat People." Members $4.50, non-members $5.50. Call 357-3030.