At a Glance

Hours: Sunrise to sunset.

Cost: Free.

Tips: Bring a scope, particularly in winter. ◾ The watershed lands are a public hunting area. Be aware of hunting seasons and plan your visit accordingly. ◾ Obey all “No Entry” and “No Parking’ signs.◾ No restrooms.

Best Seasons: Year-round.

Local MOS Chapter: Carroll County Bird Club

Liberty Reservoir Cooperative Wildlife Management Area – Bollinger Mill Road

2590 Bollinger Mill Road, Finksburg, MD 21048
(410) 795-6151

Liberty Reservoir Cooperative Wildlife Management Area (CWMA), is located on the border of Baltimore and Carroll Counties.  The Baltimore County portion is described separately in this Birder’s Guide.

Liberty Reservoir is located on the border of western Baltimore County and eastern Carroll County. This 3,100 acre reservoir was the former site of the town of Oakland Mills, until the reservoir was created in 1956 to provide drinking water for the City of Baltimore. The reservoir is 11 miles in length with 81 miles of shoreline and an average depth of 59 feet. The watershed lands surrounding the reservoir, totaling 9,200 acres, are maintained in forested habitat to protect the quality of the drinking water. The land is open to the public for hiking, biking, fishing and hunting. Although owned by the City of Baltimore, the watershed lands are operated for hunting as a Cooperative Wildlife Management Area (CWMA) by the Maryland Department of Natural Resources.

The land surrounding Liberty Reservoir is criss-crossed with a network of unmarked foot-trails. Typical trails around the reservoir are fire roads winding through forested uplands with occasional views of the lake and plenty of ups and downs. The Middle Run Trail, accessed from the trailhead at the end of Bollinger Mill Road, is markedly different. Much of this trail lies in the shallow valley of Middle Run, a pretty little stream complete with pocket wetlands, open meadows and brushy coverts. The paths are broad and the few elevation changes are gradual.  All in all, this may be the best hike at Liberty Reservoir. Simply drive to the end of Bollinger Mill Road (see Directions below) , park at the small parking area at the end of the road, and then continue east on foot. You will soon come to a foot-trail that runs north and south along the edge of the water. Turning left to go north will take up upstream along Middle Run, into good habitat for forest-dwelling interior birds. Alternatively, turning right to go south will take you along the edge of an arm of the reservoir, which may be desirable in winter when waterfowl are present.

In addition to the printable trail maps provided at the links at left, you may wish to consult an interactive mapping app such as The Hiking Project (

Access Note: It was reported by local media in summer of 2019 that the City of Baltimore has decided to permanently decommission seven fire roads within the Liberty Reservoir watershed lands. The public is no longer allowed to use these roads for hiking, hunting, biking, horseback riding, or any other use. The seven roads that have been decommissioned are Murray Road, Content Lane, Poole/Pouder Area, Glen Falls Road, Old Oakland Road to Wards Chapel Road, Cockeys Mill Road to Md. 140 and Ivy Mill Road. A citizens’ group is working to attempt to restore access; see At this time, an updated trail map showing which roads and trails are open is not available. Obey posted signs at the property.


Over 150 species have been reported on eBird for this location. Birds to look for include summer waders and swallows; summer flycatchers and vireos; warblers during spring and fall migration as well as some breeding warblers (Worm-eating, Louisiana Waterthrush, Black-and-white, Prothonotary, Kentucky, Hooded; American Redstart, Northern Parula); shorebirds in late summer/early fall; waterfowl in winter.


Go to the east end of Bollinger Mill Road, passing a private residence on the left at #2590; continue to the parking lot at the end of the road.

Special Features:

Liberty Reservoir is contained within the Patapsco Valley Important Bird Area as designated by the National Audubon Society. ◾ The local chapter of the Maryland Ornithological Society is the Carroll County Bird Club, which offers field trips and meetings with informative programs, all free and open to the public.


From the Baltimore Beltway/I-695, take Exit 18 to go west on MD Route 26/Liberty Road. Then turn right (north) onto MD Route 32S/Sykesville Road. Make sharp right (east) onto Bollinger Mill Road. Continue to end of road just past residence on left at #2590. Parking lot with hold 10-15 cars. Trails from here head both north along the Middle Run valley and south through the Coot Peninsula.

Nearby Sites:

Liberty Reservoir CWMA – Baltimore County; Soldiers Delight Natural Environmental Area; Piney Run Park and Nature Center; Morgan Run Natural Environmental Area.


Bottomland DeciduousConifersUpland Deciduous Old Fields, Shrubby Meadows Freshwater Marsh or FloodplainFreshwater Pond, Lake, or ReservoirMud Flats (Tidal or Non-Tidal)Rivers & Streams


Bicycle Trails (Bikes may be prohibited on some trails)FishingFree - No Entry FeeHiking/Walking TrailsHuntingLake, Pond, Bay, River, OceanParkingPets Allowed


Audubon Important Bird AreasHunting AreasPonds, Lakes, and ReservoirsThe Rivers of the Western Shore