CATHOLIC U. INSTRUCTIONAL camps for boys and girls ages 8 to 18 start July 11. 202-319-6092.
BRETHREN SPORTS needs men's teams for summer league starting June 26. 877-364-7112 or 301-814-4789.
BOATING SAFETY course by Coast Guard Auxiliary 14-6 starts June 27 at Hayfield High School, 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.
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 -- Friday, moonlight hike on C&O Towpath ($3); meet at 8:30 p.m. across from Old Angler's Inn; 202-203-8980 or 301-540-8267. Saturday, Skyland to Panorama ($23); 301-587-0394 or 301-984-3216. Bus for most trips leaves 16th and I NW at 8 a.m. with suburban stops.
CENTER CLUB -- Friday, to Washington parks; 703-525-3357. Saturday, to Doyles River; 703-517-3490. Saturday, to Little Bennett Park; 301-468-1896. Sunday, to Catoctin Mountains; 202-408-0814.
MOUNTAIN CLUB OF MARYLAND -- Sunday, to Susquehanna State Park; 410-337-6713. June 22, to Fort McHenry; 410-484-2211 or 410-654-9445.
NORTHERN VIRGINIA CLUB -- Saturday, to Massanutten Mountain. Saturday, to Pine Grove Furnace. Juen 18, to Rapidan Camp. Saturday, to Turkey Run. Sunday, to Stony Man. Activities tape: 703-440-1805.
POTOMAC APPALACHIAN TRAIL CLUB -- Tape: 703-242-0965.
SIERRA CLUB -- Activities tape: 202-547-2326.
WANDERBIRDS -- Sunday, to Bearfence Rocks, Shenandoah National Park ($18); 410-535-5171 or 703-941-0209. Bus for most trips leaves 17th and K at 8 a.m. with suburban stops.
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.
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.
ROCKING S RANCH has trail rides and lessons in Winchester. 540-678-8501.
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.
MOTORCYCLE SAFETY FOUNDATION offers beginner and advanced rider courses. 800-833-3995 or 800-446-9227.
TWILIGHT POLO -- Saturdays at 7, through August at Great Meadown, The Plains. 540-253-5001.
MCRRC RUN FOR ROSES 5K -- Saturday at 8 for women only at Wheaton Regional Parkl 301-353-0200.
TIM HARMON MEMORIAL 5K -- Saturday at 8:30 at Fairfax County Government Center. 703-934-8756.
WOMEN'S DISTANCE 5K -- June 25 at 8 at South Lakes High, Reston. 703-437-3668.
MARC TRAIN 5-MILE -- June 25 at 8 in Odenton. SASE to P.O. Box 57, Odenton, MD 21113. 410-551-4301.
MCRRC BURNING TREE 5K -- June 26 at 8 in Bethesda. 301-353-0200.
PVTC GO-FOURTH 8K -- July 4 at 7:30 at Belle Haven Park, Alexandria. 703-671-2520.
CURE AUTISM NOW 5K -- July 4 at 8 at Potomac Library. 301-419-8198.
DCRRC AGE-HANDICAPPED 4-MILE -- July 4 at 8 at Carderock Recreation Area. 703-241-0395.
LIFE 5K -- July 10 at 8 in Rock Creek Park. A benefit for cancer research foundations. 202-726-7819.
DCRRC BASTILLE DAY 4-MILE -- July 14 at 7 p.m. at Fletcher's Boathouse. 703-241-0395.
DCRRC TIDAL BASIN 3K -- July 20 at noon at Jefferson Memorial. 703-241-0395.
SPORTING CLAYS TOURNAMENT -- Saturday at Prince George's Trap and Skeet Center, Glenn Dale, to benefit youth organizations. $60 in advance, $70 at gate. 301-864-7952 or 301-577-7178.
WASHINGTON AREA ROADSKATERS has training and group skates in Washington. 202-249-2228.
MARYLAND TABLE TENNIS Center has daily play in Gaithersburg. 301-519-8580.
DC VOLLEYBALL has adult leagues. 202-857-0700.
FAIRFAX JUNIORS conducts youth clinics in Fairfax County.
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.