What's Doing

NSO DECORATORS' SHOW HOUSE -- Open Friday and Monday-Thursday 10 to 3, and weekends noon to 5, through Oct. 31. Explore a 13,000-square-foot residence redecorated by dozens of local designers in the annual benefit for the National Symphony Orchestra. $15 in advance, $20 at the door. Children younger than 8 not admitted. Free parking. 9121 River Rd., Potomac. 202-416-8149.

U.S. POWERBOAT SHOW -- Friday 10 to 7, Saturday 10 to 7, Sunday 10 to 6. Displays of motor yachts, cruisers, trawlers and other powerboats and watercraft, vendor sales of nautical equipment and accessories. $16, ages 12 and younger $8. At the City Dock and Harbor, Annapolis. 410-267-6711 or 410-268-8828.

HOME AND GARDEN SHOW and Craft Show, Friday 10 to 9, Saturday 10 to 9 and Sunday 10 to 6. Displays by vendors of home repair and improvement products and services, and by artists and artisans. $8, seniors $7, ages 6 to 12 $2, younger free. Maryland State Fairgrounds, York Road at I-83, Timonium. 410-863-1180.

QUILT SHOW -- Friday 10 to 5, Saturday 10 to 4, by Needlechasers of Chevy Chase. $5, seniors $3, under 12 free. St. Columba's Episcopal Church, 4201 Albemarle St. NW. 202-829-9623.

RUSSIAN ORTHODOX FESTIVAL -- Friday noon to 8, Saturday noon to 8, Sunday noon to 6. Traditional entertainment, crafts, foods. Holy Trinity Russian Orthodox Church, 1723 E. Fairmount Ave., Baltimore. 410-276-6171.

MIDDLE EASTERN FOOD FESTIVAL -- Friday noon to 9, Saturday 11 to 9. Foods, flea market, children's activities. St. George Antiochian Orthodox Church, 4335 16th St. NW. 202-723-5335.

HOT AIR BALLOON and Wine Festival, Saturday and Sunday 7 to 5; about 30 hot air balloons take flight at 7:30 and 4:30 both days, weather permitting. Entertainment, wine-tastings, antique cars, crafts, balloon rides. $10 per person, $30 per carload. Historic Long Branch Museum and Farm, 830 Long Branch Lane, Millwood, Va. 888-558-5567.

"FESTIVAL OF FREEDOM" -- Saturday and Sunday 9 to 4. Displays of World War II aircraft, entertainment by the USO Liberty Belles, tenor Daniel Rodriguez and others, children's activities, portrayals by re-enactors. $10, ages under 10 $6. Manassas Regional Airport, 10400 Terminal Rd., Manassas. 703-393-0660.

PATUXENT WILDLIFE FESTIVAL -- Saturday 10 to 3, commemorating the 125th anniversary of the U.S. Geological Survey and 65th anniversary of the Patuxent Research Refuge. Trail walks, tram tours, live animal demonstrations, children's activities. National Wildlife Visitor Center, off Powder Mill Road between Route 197 and the Baltimore-Washington Parkway. 301-497-5763 (TDD: 301-497-5779).

USED BOOK SALE -- Saturday 10 to 3. Takoma Park Library, 101 Philadelphia Ave., Takoma Park. 301-891-7259.

FARM COLOR TOUR -- Saturday and Sunday 10 to 4, self-guided tour of about 20 privately owned Loudoun County farms. Pick up brochure at Loudoun Convention & Visitors Association, 222 Catoctin Circle SE, Leesburg. 800-568-3686.

SPORTS CARD SHOW -- Saturday 10 to 4. Tysons Corner Holiday Inn, 1960 Chain Bridge Rd., McLean. 301-990-4929.

USED BOOK SALE -- Saturday and Sunday 10 to 4, and Oct. 23-24. Sponsored by the Associates of the American Foreign Service Worldwide at the State Department, 23rd and C NW. 202-223-5796.

APPLE HARVEST FESTIVAL -- Saturday and Sunday 10 to 4:30. Entertainment, crafts fair, food vendors. Graves Mountain Lodge, Route 670, Syria, Va. 540-923-4231.

OKTOBERFEST -- Saturday 10 to 5, Sunday noon to 5. Traditional German music, foods and beverages, crafts. Schifferstadt Architectural Museum, 1110 Rosemont Ave., Frederick. 301-668-6088.

RESTON HOUSE TOUR -- Saturday 10 to 5. Visit five Reston homes. $20 in advance, $25 Saturday; purchase tickets at the Reston Museum, 1639 Washington Plaza, Lake Anne Village Center, Reston. 703-709-7700.

ANTIQUES FAIR -- Saturday 10 to 6, Sunday 11 to 5. About 150 dealers. $9, includes admission to mansion and gardens. Oatlands Plantation, on U.S. 15 six miles south of Leesburg. 703-777-3174.

THEODORE ROOSEVELT'S BIRTHDAY Party, Saturday 11 to 3, with ranger-led walks, birdhouse building, exhibits, live animals. On Theodore Roosevelt Island; parking and entrance on George Washington Parkway, Arlington. 703-289-2500.

ANTIQUE AND CLASSIC CAR Show, Saturday 11 to 4. About 400 vehicles displayed by 21 car clubs, parts flea market, entertainment, children's activities, food vendors. Civic Center Park, Baltimore Road and Edmonston Drive, Rockville. 240-314-5022.

ARTS AND CRAFTS FESTIVAL -- Saturday 11 to 5. About 35 exhibitors, pony rides, hayrides, entertainment, food vendors. Patuxent River Park 4H Center, 18405 Queen Anne Rd., Upper Marlboro. 301-249-9761.

IRISH FESTIVAL -- Saturday 11 to 5. Music, storytelling, dancers. Marie Reed School field, 18th and California NW. 202-449-3804.

BARRACKS ROW FESTIVAL -- Saturday 11 to 5. Entertainment, crafts fair, food vendors. Outdoors along Barracks Row, in the 500 through 700 blocks of Eighth Street SE. 202-544-3188.

GREENBELT FESTIVAL -- Saturday noon to 5. Entertainment, hayrides, games. Greenbelt Park, 6565 Greenbelt Rd., Greenbelt. 301-344-3948.

JAZZ AND WINE FESTIVAL -- Saturday and Sunday noon to 6. Wine-tastings, music, food vendors, crafts fair. $10. Linganore Winecellars, 13601 Glissans Mill Rd., Mt. Airy. 301-831-5889.

CLARENDON DAY -- Saturday noon to 6. Entertainment on three stages, arts and crafts fair, food vendors. Outdoors along Wilson and Clarendon boulevards at Garfield Street in the Clarendon neighborhood of Arlington. 703-276-0228.

AMERICAN INDIAN ART SHOW -- Saturday noon to 6, Sunday 10 to 5. Displays of pre-1940 American Indian arts and crafts by about 45 dealers. $10. Andrew W. Mellon Auditorium, 1301 Constitution Ave. NW. 703-914-1268.

MARYLAND RENAISSANCE Festival -- through Oct. 24. Open Saturday and Sunday 10 to 7. Crafts displays, entertainment on multiple stages, food vendors and other activities at a 25-acre re-creation of a 16th-century English village. $17, seniors $15, ages 7 to 15 $8, younger free. On Crownsville Road off Route 450, Crownsville. 800-296-7304 or 410-266-7304.

BENEFIT GALA -- Saturday at 7, with music by the Mary Ann Redmond Band. $45, for Bethesda Cares and A Wider Circle. Imagination Stage, 4908 Auburn Ave., Bethesda. 301-657-1010.

HISTORIC ROCKVILLE TOUR -- Sunday noon to 5, tour eight 19th-century sites in Rockville. $12 in advance, $15 Sunday; purchase tickets at Appalachian Spring, 1641 Rockville Pike. 301-762-0096.

MEMORIAL ANNIVERSARY -- Sunday at 2, ceremony and remarks commemorating the seventh anniversary of the Women in Military Service for America Memorial, with music by the American Balalaika Symphony. At the Memorial, at the gateway to Arlington National Symphony. 800-222-2294 or 703-533-1155.

EBONY FASHION FAIR -- Sunday at 3. Sponsored by the Washington D.C. Chapter, Continental Societies Inc. $20 to $70. Kennedy Center Concert Hall, 2700 F St. NW. 202-467-4600.

Bazaars/Flea Markets

SIDWELL FRIENDS SCHOOL -- Friday 9:30 to 8, Saturday 10 to 4. 3853 Wisconsin Ave. NW. 202-537-8110.

WOMAN'S CLUB OF Bethesda, Friday 10 to 4, Saturday 9 to 3. 5500 Sonoma Rd., Bethesda. 301-530-9854.

TAUXEMONT COOPERATIVE Preschool, Saturday 8 to noon. 7719 Fort Hunt Rd., Alexandria. 703-780-8904.

GLENN DALE FIRE Association, Saturday 9 to 1. 11900 Glenn Dale Blvd., Glenn Dale. 301-853-6723.

HUGHES UNITED METHODIST Church, Saturday 9 to 2. 10700 Georgia Ave., Wheaton. 301-949-8383.

GLENN DALE UNITED Methodist Church, Saturday 9 to 2. Good Luck and Springfield roads, Glenn Dale. 301-249-4330.

TUCKER ROAD COMMUNITY Center, Saturday 9 to 3. 1771 Tucker Rd., Fort Washington. 301-248-4404.

ST. PATRICK'S EPISCOPAL Church, Saturday 9 to 3. 3241 Brush Dr., Falls Church. 703-532-5656.

PALISADES COMMUNITY Church, Saturday 10 to 3. 5200 Cathedral Ave. NW. 202-966-7929.