BELTSVILLE CLUB plays Sundays. 301-937-6613.
D.C. CLUB plays Thursdays at St. Alban's School, Washington. 202-776-7707.
BOATING & SEAMANSHIP and Sailing Fundamentals courses start Sept. 8 in Beltsville with Coast Guard Auxiliary 72. 301-464-8083 or 301-779-3184.
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 or 410-280-2040.
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.
CANOE CRUISERS has one-hour beginner classes through August at Fletcher's Boathouse and at Swain's Lock. 301-434-4007.
WOMEN'S FLAG league needs players and teams for October tournament. 571-330-4469.
APPALACHIAN MOUNTAIN CLUB -- Tape: 202-298-1488.
CAPITAL CLUB -- Saturday, to North Central Railroad Trail ($18); 703-765-5066 or 202-244-1969. Bus for most trips leaves 16th and I NW at 8 a.m. with suburban stops.
CENTER CLUB -- Saturday, to Rocky Knob; 703-527-2349. Sunday, to Bull Run; 202-362-9428. Tuesday, in Old Town Alexandria; 202-419-3420.
MOUNTAIN CLUB OF MARYLAND -- Wednesday, to Gambrill State Park; 410-841-6319. Wednesday, to Patapsco State Park; 410-737-2050.
NORTHERN VIRGINIA CLUB -- Sunday, to Lake Accotink. Activities tape: 703-440-1805.
POTOMAC APPALACHIAN TRAIL CLUB -- Tape: 703-242-0965.
SIERRA CLUB -- Saturday, to Austin Mountain. Tuesday, to Knob Mountain. Activities tape: 202-547-2326.
WANDERBIRDS -- Sunday, to Buck Ridge, Hazel Mountain ($18); 703-425-8690 or 410-535-5171. Bus for most trips leaves 17th and K at 8 a.m. with suburban stops.
MORVEN PARK SHOWS -- Short Circuit Hunter Show and Summer Breed Show, Saturday from 8 to 5 at Morven Park Equestrian Center, Leesburg. 703-777-2890.
ARROWHEAD EQUESTRIAN Center has lessons for children and adults near Manassas. 703- 594-3512.
BROAD RUN RIDING SCHOOL in Midland has lessons for children and adults. 540-439-9586.
BUCK VALLEY RANCH -- Trail rides near Cumberland. 717-294-3759.
CLAY HILL STABLES has classes in Landover. 301-773-0444.
ELK MOUNTAIN TRAILS has guided rides near Harpers Ferry. 301-986-8483 or 301-834-8882.
EQUILIBRIUM HORSE CENTER has instruction in Gambrills, Md. 410-721-0885.
EQUESTRIAN ENTERPRISES has weekday trail rides and Saturday instruction in Great Falls, Va. 703-759-2474.
FORT VALLEY STABLES has trail rides in Massanutten Mountains. 888-754-5771 or 540-933-6633.
FOXCHASE FARM has riding lessons and introduction to fox hunting in Middleburg. 540-687-5255.
GREENWAY STABLES offers unguided trail rides near Dulles Airport. 703-327-6117.
HARMON'S HAYRIDES -- Horse-drawn wagon rides near Brandy Station. 540-825-6707.
HIGHLANDER HORSES has trail rides in Shenandoah Valley. 540-636-4523.
HUNTER EQUESTRIAN CENTER offers riding lessons in Clinton. 301-292-9006.
LOFTMAR STABLES has hunter seat lessons in Bowie. 301-249-7893.
MARRIOTT RANCH -- Trail rides in the Blue Ridge Mountains. 540-364-2627.
MEADOWBROOK STABLES has lessons for children and adults in Chevy Chase. 301-589-9026.
MERRYMOUNT EQUESTRIAN CENTER -- Classes for children and adults in Upper Marlboro. 301-868-2109.
MOUNTAIN SPRING STABLE has trail rides in Blue Ridge Mountains. 703-987-9545.
MOUNTAINTOP RANCH has trail rides in the Shenandoah Valley and Blue Ridge Mountains. 540-298-9542.
PISCATAWAY STABLE has trail rides and hay rides in Clinton. 301-297-9808.
POTOMAC GLEN RIDING School has lessons for children and adults near Germantown. 301-601-0622.
POTOMAC HORSE CENTER offers lessons in Gaithersburg. 301-208-0200.
RIVER BOTTOM TRAIL RIDERS has trail rides in Patuxent River State Forest. 301-253-0999.
ROCK CREEK PARK HORSE CENTER has classes and rides in Northwest Washington. 202-362-0117.
RODES FARM has trail rides, lessons and pony rides in Blue Ridge Mountains. 804-325-8260.
TAMARACK STABLES has lessons and trail rides in Goldvein, Va. 703-752-7367.
TARTAN FARMS has lessons in Poolesville. 301-972-8567.
WATER'S GIFT EQUESTRIAN Center has English riding lessons in Burtonsville. 301-421-0380.
WHEATON PARK STABLES offers classes for children and adults, and Sunday trail rides. 301-622-2424.
WOODLAWN STABLES has lessons in Alexandria. 703-780-4344.
ALEXANDRIA CLUB needs college-level players for fall. 703-535-6776.
MOTORCYCLE SAFETY FOUNDATION offers beginner and advanced rider courses. 800-833-3995 or 800-446-9227.
LOCUST SHADE PARK 5K -- Saturday at 7:30 in Triangle. 703-221-8579.
VOLKSMARCH 10K/5K WALKS -- Saturday in Rockville; start course 7 to 9. 301-460-0453 or 301-294-1191.
MCRRC COMUS CROSS COUNTRY 5K -- Sunday at 5 p.m. in Comus. 301-353-0200.
DCRRC BETHESDA 5K -- Sunday at 6 p.m. at Lynnbrook Recreation Center, Bethesda. 703-241-0395.
DCRRC TIDAL BASIN 3K -- Wednesday at noon at Jefferson Memorial. 703-241-0395.
DCRRC PAUL THURSTON 4.5-MILE -- Thursday at 6:45 p.m. at Burke Lake Park. 703-241-0395.
ARLINGTON COUNTY FAIR MILE -- Aug. 21 at 8:30 at Thomas Jefferson Community Center, Arlington. 703-241-0395.
WOMEN'S DISTANCE FESTIVAL 5K -- Aug. 28 at 8 in College Park; men's estimated time run at 8:45. 301-927-1924.
KNIGHTS OF COLUMBUS 5K -- Sept. 4 at 9 at Burke Lake Park. 703-922-4350.
LARRY NOEL GREENBELT 15K/5K -- Sept. 5 at 9 in Greenbelt. 703-241-0395.
MCRRC KIDS SLIGO RUNS -- Sept. 12 at 2 in Silver Spring, for ages 18 and under. 301-353-0200.
DCRRC TIDAL BASIN 3K -- Sept. 15 at noon at Jefferson Memorial. 703-241-0395.
MCRRC LAKE NEEDWOOD 10K -- Sept. 25 at 8 in Derwood. 301-353-0200.
PENNSYLVANIA AVENUE MILE/5K/10K -- Sept. 25 at 8:30 in Washington. 703-241-0395.
NATIONAL CAPITAL 20-MILE/5-MILE -- Sept. 26 at 7:30 in Alexandria. 703-241-0395.
WASHINGTON WOMEN'S league needs players. 703-827-7907.
MEN'S NORTHERN VIRGINIA team needs players for premier and recreation teams. 703-620-5425.
NVSL OVER-30 MEN'S team needs college-level players. 703-204-2475.
ARLINGTON WOMEN'S 30+ team needs players and goalkeeper. 703-893-6370.
ARLINGTON COED team needs female players for Saturday games. 703-499-3816.
NORTHERN VIRGINIA Senior Softball seeks men 50+ and women 40+ for Tuesday and Thursday morning leagues. 703-860-1876 or 703-524-5576.
MONTGOMERY COUNTY COED team needs female players. 301-990-4929.
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.
INNER QUEST offers frequent classes in kayaking, canoeing, rock climbing and caving. 703-478-1078.
VENTURE EXERCISE for blind and disabled athletes, Saturdays at D.C. YMCA. 301-248-2681.
WASHINGTON WOMEN OUTDOORS offers cycling, hiking, rock climbing, canoeing and kayaking trips and instruction. 301-864-3070.