BOATING AND SEAMANSHIP course with Coast Guard Auxiliary 7-10 starts Oct. 18 in Gaithersburg. 301-926-1054.
U.S. COAST GUARD AUXILIARIES and U.S. Power Squadrons offer power and sail courses. 800-336-2628; in Virginia, 800-245-2628.
TOUR DU PORT -- Sunday at Rash Field in Baltimore's Inner Harbor, 22-mile and eight-mile rides; registration open 7 to 8:30; start ride 7:30 to 9. 410-235-3678.
AMERICAN U. CLUB has classes and lessons. 703-321-4922.
CAPITOL HILL CLUB meets Mondays and Saturdays. 202-543-7434.
CHEVY CHASE CLUB meets at Chevy Chase Center. 301-774-7777.
D.C. FENCERS CLUB meets at Forest Glen Fencing Center. 301-562-1990.
FAIRFAX FENCERS has lessons in Chantilly. 703-352-2642.
GEORGE MASON U. CLUB -- 703-321-4922.
GEORGE WASHINGTON U. CLUB -- 301-495-9422.
INTERNATIONAL SCHOOL of Fencing has classes in Tysons Corner. 703-781-3015.
MONTGOMERY REC CLUB meets in Rockville. 301-774-7777 or 301-217-6797.
NIH CLUB meets in Bethesda. 301-435-1214.
OAKLAWN FENCING CLUB meets in Clinton. 301-248-9035.
OLDE TOWN CLUB meets in Alexandria. 703-549-7451 or 703-645-0271.
SMC CLUB meets in Silver Spring. 301-565-0665.
SOUTHERN MARYLAND club meets in Lusby. 301-863-3553 or 301-862-3279.
VIRGINIA ACADEMY OF FENCING has lessons in Springfield. 703-321-4922.
ARLINGTON COUNTY COED TEAM seeking female players for Saturday games. 703-899-1258.
MEN'S/CO-ED LEAGUES need players and teams. 703-851-3332.
APPALACHIAN MOUNTAIN CLUB -- Tape: 202-298-1488.
CAPITAL CLUB -- Friday, on the towpath by moonlight; meet at parking lot across from Old Angler's Inn at 8:30; 202-203-8980 or 703-451-9223. Saturday, to Big Schloss/Little Schloss ($23); 703-401-2719 or 703-528-6209. Bus for most trips leaves 16th and I NW at 8 a.m. with suburban stops.
CENTER CLUB -- Saturday, to Doyles River; 703-517-3490. Sunday, to Bull Run Mountain; 202-408-0814. Oct. 18, in Old Town Alexandria; 202-419-3420.
MOUNTAIN CLUB OF MARYLAND -- Wednesday, to Patapsco State Park; 410-737-2050. Wednesday, to Old Rag; 410-796-2722.
NORTHERN VIRGINIA CLUB -- Activities tape: 703-440-1805.
POTOMAC APPALACHIAN TRAIL CLUB -- Tape: 703-242-0965.
SIERRA CLUB -- Activities tape: 202-547-2326.
WANDERBIRDS -- Sunday, to Bluff and Mount Marshall trails ($18); 540-636-7161 or 301-294-1356. Bus for most trips leaves 17th and K at 8 a.m. with suburban stops.
MOTORCYCLE SAFETY FOUNDATION offers beginner and advanced rider courses. 800-833-3995 or 800-446-9227.
QUANTICO CLUB -- Sunday at Prince William Forest Park. 301-765-0841.
DCRRC 5-MILE -- Saturday at 9 at Fletcher's Boathouse. 703-241-0395.
TPK 5-K -- Saturday at 9 at Truro Church in Fairfax. 703-691-1006.
CRIME VICTIMS FUN 5K/1-MILE -- Saturday at 9 at Watkins Park, Upper Marlboro. 301-952-3801.
DCRRC 10K/1-MILE -- Sunday at 8 at West Potomac Park. 703-241-0395.
HOME RUN 10K/5K -- Oct. 16 at 8:30 at Hebrew Home of Greater Washington, Rockville. 301-770-8351.
DCRRC 3K -- Wednesday at noon at the Jefferson Memorial. 703-241-0395.
"MAKE A DIFFERENCE" 5K Walk/Run, Oct. 22 at 8:30 in Fort Washington. 301-203-6000.
MCRCC CANDY CANE 5K -- Oct. 22 at 9 in Chevy Chase. 301-353-0200.
JOHN SARVEY 5K -- Oct. 22 at 11 at Thornton Friends School, Silver Spring. 301-384-6672.
ALS ASSN. 3-MILE WALK -- Oct. 23 at 10 in Washington. 301-978-9855.
DC VOLLEYBALL has adult leagues. 202-857-0700.
FAIRFAX JUNIORS has youth clinics in Fairfax County. 703-476-1017.
MID-ATLANTIC Volleyball has clinics and tournaments. 301-972-3611.
USA VOLLEYBALL Chesapeake Region has information about leagues, clinics, camps and tournaments. 301-270-0710.
VOLLEYBALL HOUSE in Elkridge has leagues and clinics. 410-579-1007.