African American Heritage Memorial Park
Agricultural History Farm Park
Airlie Conference Center (Restricted Access)
Algonkian Nature Preserve--Sanctuary Trail
Algonkian Regional Park
American Bird Conservancy Office
Anacostia Park
Anacostia River Trail (PG Co.)
Annandale Community Park
Arrowbrook Park
Ashburn Village Lake
Ashburn--Alder Lake
Ashby Pond Conservancy Site
Aspen Hill
Audubon Naturalist Society - Woodend Sanctuary
Avenel Local Park
Baker Park, Frederick
Banshee Reeks Nature Preserve
Beaverdam Creek Reservoir
Belle Haven Park--North Parking Area
Belmont Bay Marina
Ben Brenman Park
Benjamin Banneker Park
Bethesda Trolley Trail--Tuckerman La.-Tilden La.
Black Hill RP--Boat Ramp area
Black Hill RP--Little Seneca Lake, Rte.121
Black Hill RP--Ten Mile Creek area, trails and lake
Black Hill Regional Park
Bladensburg Waterfront Park
Bles Park
Blue Mash Nature Trail
Brewer House Rd. Pond
Briggs Road
Bristoe Station Battlefield
Bristow Road Sod Farm
Broadlands Wetlands Nature Preserve
Brookfield Park
Brookside Gardens
Brookside Nature Center
Bull Run Mountains State Natural Area Preserve
Burke Lake Park
Buzzard Point Park
C&O Canal--Chain Bridge
C&O Canal--Fletcher's Cove (Fletcher's Boathouse)
C&O Canal--Great Falls
C&O Canal--Harpers Ferry
C&O Canal--Little Falls
C&O Canal--Locks 10-12
C&O Canal--Mouth of the Monocacy (Fred. Co.)
C&O Canal--Nolands Ferry
C&O Canal--Old Angler's Inn - Billy Goat Trail Section B
C&O Canal--Pennyfield Lock
C&O Canal--Potomac Boat Club
C&O Canal--Riley's Lock
C&O Canal--Swains Lock
C&O Canal--Sycamore Landing
C&O Canal--Violette's Lock
C&O Canal--White's Ferry
Cabin John Regional Park
Claude Moore Park
Claymont Wetland
Clemyjontri Park/Langley Fork Park
Cleveland Park
Clifton Institute (Restricted Access)
Colmar Manor Park
Colston Road Pond
Constitution Gardens and Reflecting Pool
Cool Spring Preserve
Country Club Rd
Creighton Road Pond
Croydon Creek Nature Center, Rockville
Custis Trail
Daingerfield Island
Daniels Run Park
Darnestown Rd. ponds
Discovery Boulevard Pond
Dulles Airport--Pond
Dulles Greenway Wetlands Mitigation Project
Dumbarton Oaks Park
Dyke Marsh Wildlife Preserve
Eakin Community Park
East Potomac Park--Hains Pt.
Ellanor C. Lawrence Park
Ellerslie Road
Evans Parkway Park
Fairfax County--Landfill
Fairland Recreational Park
Fairland Regional Park (PG Co.)
Fort Bunker Hill Park
Fort C.F. Smith Park
Fort Dupont Park
Fort Reno
Fort Totten Park
Fred Archibald Audubon Sanctuary
Frying Pan Farm Park
Fulton Pond
Fulton--Lime Kiln and Reservoir Roads Pond
George Mason Conference Center
George Washington Memorial Parkway--First Overlook
Georgetown Reservoir
Georgetown Waterfront Park
Glencarlyn Park--Sparrow Pond
Glenstone Museum (restricted access)
Gravelly Point (DC waters)
Gravelly Point Park
Great Falls Library Park
Great Falls Park
Green Hills Farm Wetland
Green Spring Garden Park
Greenway Trail--Huntmaster Rd to Brink Rd (Incl. Goshen Park)
Gunners Lake
Harper's Ferry National Historical Park
Harpers Ferry NHP-- Schoolhouse Ridge -South
Harpers Ferry NHP--Maryland Heights
Harpers Ferry NHP--Schoolhouse Ridge- North
Harpers Ferry NHP-Bolivar Heights Battlefield
Horsepen Run Trail
Hoyles Mill Conservation Park
Hughes Hollow - McKee Beshers WMA
Hughes Rd. polo fields
Hunting Creek Bridge
Huntley Meadows Park
Huntley Meadows Park--Hike and Bike Trail
Huntley Meadows Park--Observation Tower
Huntley Meadows Park--Visitor Center Feeder Area
I-70 at East St. storm pond, Frederick
International Conservation House, 7078 Airlie Road
Jackson Miles Abbott Wetlands Refuge
Jefferson Manor Park
John Rissler Road
Jones Point Park
Jones Point Park (DC waters)
Ken-Gar Palisades Park
Kenilworth Park and Aquatic Gardens
Kincora Wetlands
Kingman Island South - Kingman Lake
Kingstowne Lake
LBJ Memorial Grove - Columbia Island Marina
LM Stevens Park
Lake Anne (Reston)
Lake Artemesia
Lake Audubon
Lake Brittle
Lake Churchill, Germantown
Lake Fairfax
Lake Fairfax Park
Lake Frank
Lake Linganore
Lake Needwood
Lake Newport
Lake Ridge Park
Lake Thoreau
Laurel Hill Equestrian Center
Leopold's Preserve
Lilypons Water Gardens
Little Falls Parkway, Bethesda
Little Georgetown of Grace Cemetery
Lockes Boat Ramp
Lois Y. Green Conservation Park
Long Bridge Park
Loudoun Water Authority
Lower Senate Park
Luria Park
MLK Rec. Park
Madison Manor Park
Manassas National Battlefield Park
Manassas National Battlefield Park--Brawner Farm
Manassas National Battlefield Park--Brownsville Tract
Manassas National Battlefield Park--Deep Cut Trail
Manassas National Battlefield Park--Portici Area
Mantua Park
McClellan Drive retention ponds
McMillan Reservoir
McRaes Road Pond Area
Meadowood Recreation Area
Meadowood Recreation Area--Mustang Trailhead
Meadowside Nature Center
Middlesex Drive pond
Millville--Bloomery Rd
Monocacy National Battlefield--Ford Loop Trail
Monocacy National Battlefield--Gambrill Mill Trail
Monocacy River Path
Morven Park
Moyer Rd. Park
Mt. Briar Wetlands Preserve
NIH campus (restricted access; photo i.d. needed)
National Arboretum
National Mall
National Zoological Park
New Bristow Village pond
Nokesville Road Interchange Ponds
North Fork Wetlands
Northern Virginia Community College--Loudoun
Northwest Branch Trail
Oak Marr Park
Oaks Landfill (private)
Occoquan Bay NWR
Occoquan Bay NWR--Delta Road
Occoquan Sewage Plant (UOSA)
Oronoco Bay Park
Partnership Rd. Farm Pond
Patton Turf Farm
Patuxent River SP--Annapolis Rock Rd
Patuxent River SP--Hipsley Mill Rd. (Howard Co.)
Potomac Heritage Trail
Potomac Overlook Regional Park
Prince William Co.--Landfill
Rachel Carson Conservation Park
Reagan National Airport
Riderwood Village (restricted access)
Riverbend Park
Roaches Run Waterfowl Sanctuary
Rock Creek Golf Course
Rock Creek Park
Rock Creek Park--Dog Run
Rock Creek Park--Maintenance Yard
Rock Creek Park--Melvin C. Hazen Trail
Rock Creek Park--West End
Rock Hill District Park
Route 621 Stream Crossing
Royal Lake Park
Runnymede Park
Rust Nature Sanctuary
Schooley Mill Park
Seneca Trailhead Park/Seneca Tract
Shannondale Lake
Shannondale Springs WMA
Shenandoah River-Bloomery Rd.--Millville-Rt 115
Shenandoah University River Campus at Cool Spring Battlefield
Shirlington Park
Silver Lake Regional Park
Sky Meadows SP--Bridle Trail
Sky Meadows SP--North Ridge Trail
Sky Meadows SP--Visitor Center area
Sligo Creek Park--Dennis Ave. to Wayne Ave.
Sligo Creek Park--Wayne Ave. to south end
Sligo Creek Park--north end to Dennis Ave.
Soapstone Valley Park
South Germantown Recreational Park
Stratton Woods Park
Sully Woodlands
Sunrise Valley Park (Herndon Monroe Wetland Preserve)
Sycamore Lake
Sycamore Landing Rd. fields
The Ellipse
The Turner Farm/Observatory Park
The Yards Park
Theodore Roosevelt Island
Three Sisters Islands
Tide Lock Park (DC waters)
Triadelphia Reservoir--Brighton Dam (Montgomery County)
Tuscarora Creek Development
Twin Branches Trail
U.S. Botanic Garden and Bartholdi Park
Verizon ponds (Ashburn)
Victory Lakes
Walker Nature Center--Reston
Warfield's Pond Park
Washington Grove Forest Preserve
Washington Sailing Marina (DC waters)
West Potomac Park--Tidal Basin
Western Regional Park
Weverton
Wheaton Branch Stormwater Ponds
Wheaton Regional Park
Wheaton Regional Park--mini-train tracks/Pine Lake
White Oaks Park
Whitehaven Park
Whittier Lake Park
Woodbridge Veterans Memorial Park
Woodglen Lake
Woodmar Farm (private)
Woottons Mill Park
Zachary Taylor Nature Area
stakeout Trumpeter Swan, Fairview Street Northwest (2018)