Bluegrass Festival

Doc Watson, the Seldom Scene, Ralph Stanley, the David Grisman Quintet, the Nashville Bluegrass Band, the Lonesome River Band and many other bluegrass groups will perform at the three-day Stompin' '99 at Buffalo Gap campground in Capon Bridge, W. Va. The music is Friday and Saturday from noon to midnight, Sunday from 11 to 8. Tickets are $89 for all three days, $60 for two and $35 for one. Take Route 7 to Winchester and then U.S. 50 west to Capon Bridge and follow signs. Call 877/852-5800.

Court's in Session

In Colonial times, the periodic meetings of the county court were cause for celebrations and fairs. Those days are reenacted during August Court Days, Saturday and Sunday from 10 to 5 throughout Leesburg's historic district, with such activities as militia drills and mock trials, more than 200 costumed living history interpreters, folk and country music concerts, dancers, strolling entertainers and crafts. Admission is $5 (children 11 and younger free). Take Route 7 west directly into Leesburg. The festival takes place around Market and King streets. Call 800/752-6118.

Air Power

Aerial shows by the Navy's F/A-18 jet team and the Air Force's F-16 team, wing-walkers and aerobatics, a parachute jump by the 82nd Airborne Jump Team and displays of more than 100 aircraft, including 50 World War II warplanes, are featured at the Wings of Freedom Airshow, Saturday and Sunday from 8 to 6 at the Frederick Municipal Airport in Frederick. Advance tickets are $9, $4 for children 6 through 12 (younger free) and $11 and $5 at the gate. Take I-270 north to Route 85 north, bear left on Route 355, turn right on Patrick Street and continue to the parking area at the Frederick County Fairground. From the fairground, the airport is a short walk; free shuttle buses will be available for the elderly and disabled. For tickets or information, call 301/631-5357.

Lang & Cray

Bluesmen Jonny Lang and the Robert Cray Band perform Friday at 8 at Wolf Trap's Filene Center, 1551 Trap Rd., Vienna. Lawn tickets are $18 (in-house tickets are nearly sold out). For tickets, call ProTix, 703/218-6500 (service charges). For information, call 703/255-1860.

Christmas in August

The U.S. Air Force Band presents its annual Christmas in August concert, Friday at 8 on the west terrace of the U.S. Capitol (Metro: Union Station, Capitol South). The program features the music of Christmas and Hanukah and other works with winter themes. The concert is free and no tickets are required. Call 202/767-5658.

Young Opera

Students participating in the Washington Opera's annual "Opera Camp for Kids" will present free performances of a 35-minute one-act children's opera, "The Thunder of Horses," Saturday and Sunday at noon and 2 at the Trapier Theater of St. Albans School, Wisconsin and Massachusetts avenues NW. Talks by composer Cary John Franklin begin one hour before each performance. The opera is loosely based on a Blackfoot legend that explains the origin of horses. The performances are free, but reservations are required. Call 202/295-2461.

Arlington County Fair

The Arlington County Fair continues this weekend and celebrates the county's ethnic diversity with hundreds of exhibits and vendors, carnival rides and games. The fair is open Friday and Saturday from 10 to 10 and Sunday from 11 to 6. Admission is free. The fair is at the Thomas Jefferson Community Center, 3501 Second St. South, Arlington. Free shuttles run during fair hours from the Ballston Metro station and the free parking lots at the Arlington Career Center, 816 S. Walter Reed Dr.; the I-66 parking deck at Washington & Lee High School, 1300 N. Quincy St.; and Culpeper Garden, 4435 N. Pershing Dr. Call 703/228-6400. Web site: www.capaccess.org/acfair.

Have a Vine Time

Sample vintages from more than 50 Virginia wineries and enjoy music and entertainment at the 24th annual Virginia Wine Festival, Saturday and Sunday from 11 to 6 at Great Meadow, on Route 245, 2.5 miles south of I-66 in The Plains, Va. Activities include wine seminars, arts and crafts, and live music by the David Bach Consort, Elephant Boy, the Impresarios and other bands. Admission, which includes a wine glass and tastings, is $18; $5 for ages 3 through 20 (younger free). Designated drivers pay the full price and receive a wristband that entitles them to free soft drinks. Call 800/520-9670.