CATHOLIC U. INSTRUCTIONAL camps for boys and girls ages 8 to 18 start Monday. 202-319-6092.
BOATING SAFETY course with Coast Guard Auxiliary 14-6 starts July 25 at Hayfield High, Alexandria. 703-780-8914.
ANNAPOLIS SAILING SCHOOL and Powerboat School offers beginning and advanced courses, and Kidship sailing courses for ages 5 to 15. 800-638-9192.
CHESAPEAKE SAILING SCHOOL has courses in Annapolis. 800-966-0032.
J WORLD has courses in Annapolis. 800-966-2038.
MARINER SAILING SCHOOL offers courses in Alexandria. 703-768-0018.
WOMANSHIP offers courses in Annapolis. 800-342-9295
U.S. COAST GUARD AUXILIARIES and U.S. Power Squadrons offer power and sail courses. 800-336-2628; in Virginia, 800-245-2628.
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.
ALL-STAR CAMPS for ages 8 to 15 with Coach Bill McGregor start July 18 in Kensington and July 25 in Riverdale. 301-596-3921 or 301-864-2755.
APPALACHIAN MOUNTAIN CLUB -- Tape: 202-298-1488.
CAPITAL CLUB -- Saturday, to Doyles River/Big Run trails ($23); 703-660-0840 or 703-812-4855. Bus for most trips leaves 16th and I NW at 8 a.m. with suburban stops.
CENTER CLUB -- Saturday, to Rip Rap Hollow; 703-451-1341 or 202-337-1434. Sunday, to Sugarloaf Mountain; 301-946-2520.
MOUNTAIN CLUB OF MARYLAND -- Saturday, to Gettysburg Battlefield; 410-871-0066. Sunday, to Jerusalem Mill; 410-337-6713.
NORTHERN VIRGINIA CLUB -- Saturday, to Thornton Hollow. Sunday, Skyland to Panorama. Sunday, to Lake Accotink. Activities tape: 703-440-1805.
POTOMAC APPALACHIAN TRAIL CLUB -- Tape: 703-242-0965.
SIERRA CLUB -- Saturday, to Gathland State Park. Sunday, to Overall Run trail. Sunday, to Tuscarora Trail. Activities tape: 202-547-2326.
WANDERBIRDS -- Sunday, to Cacapon State Park, with swimming ($18); 703-352-4685 or 703-280-5934. Bus for most trips leaves 17th and K at 8 a.m. with suburban stops.
GIRLS CAMP by Academy International, July 18-22 at Great Meadow, The Plains. 888-529-3827.
MOTORCYCLE SAFETY FOUNDATION offers beginner and advanced rider courses. 800-833-3995.
TWILIGHT POLO -- Saturdays at 7 through August at Great Meadown, The Plains. 540-253-5001.
MCRRC MIDSUMMER MILE -- Friday at 7 p.m. at Rockville High. 301-353-0200.
LIFE 5K -- Sunday at 8 in Rock Creek Park. A benefit for cancer research foundations. 202-726-7819.
DCRRC BASTILLE DAY 4-MILE -- Thursday at 7 p.m. at Fletcher's Boathouse. 703-241-0395.
MCRRC ROCKVILLE ROTARY 8K -- July 16 at 8:45 p.m. in Rockville. 301-353-0200.
DCRRC TIDAL BASIN 3K -- July 20 at noon at Jefferson Memorial. 703-241-0395.
MCRRC RILEY'S RUMBLE -- July 24 at 7 at Riley's Lock, Potomac. 301-353-0200.
DCRRC 1-MILE/3-K -- July 27 at 6:30 p.m. at Washington-Lee High School, Arlington. 703-241-0395.
MCLEAN GIRLS U10 team needs players. 703-556-4049.
MARYLAND TABLE TENNIS Center has daily play in Gaithersburg. 301-519-8580.
COLONIAL BEACH TRIATHLON -- Sunday at Rappahannock Area YMCA, Falmouth, Va., 1K swim, 40K bike, 10K run. 540-371-9622.
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.