The Patapsco Regional Greenway (PRG)

The Patapsco Regional Greenway (PRG) Concept Plan and Implementation Matrix identifies and prioritizes a shared-use path system along the Patapsco Valley between Sykesville and the Inner Harbor of Baltimore. This 58-mile system uses existing trails, roads and utility corridors to connect neighborhoods and destinations in Baltimore City and Baltimore, Anne Arundel, Howard and Carroll Counties. A completed greenway system will improve opportunities for alternative transportation, recreation and economic development for communities along the route. This project was led by Baltimore Metropolitan Council (BMC) and the Baltimore Regional Transportation Board’s (BRTB) Bicycle Pedestrian Advisory Group (BPAG). The Concept Plan for this project was Accepted by the BRTB on November 28, 2017. Now the implementation matrix can be utilized by BRTB partners to build segments of the plan.

While most of the PRG corridor will be a greenway and linear trail within Patapsco Valley State Park (PVSP) there is potential for additional economic activity around the areas outside of the park. In Carroll County, the desire is for this regional system to connect to Sykesville’s Historic Main Street. Neighborhood connections within Sykesville to the PRG are also examined to increase activity along the proposed greenway. The PRG is ranked priority #1 for regional bike-ped projects, in the County’s Bicycle & Pedestrian Master Plan.

Sykesville to McKeldin Segment of the PRG (Carroll County)
Through BMC’s Unified Planning Work Program (UPWP) Carroll County received money for 30% (preliminary) design of its portion of the PRG. Carroll County in partnership with the Town of Sykesville, BMC, Maryland Department of Transportation - State Highway Administration (MDOT SHA), and PVSP, began working with RK&K (civil engineering consulting firm) in February 2021 on the design of two sections of the PRG. RK&K is scheduled to finish the preliminary design in December 2021 and provide a preferred route selection, survey, preliminary engineering designs, and construction cost estimates.

What's Happening Now?
The Baltimore Regional Transportation Board (BRTB), as the metropolitan planning organization for the Baltimore region, seeks public comments through Friday, October 29 on the preferred alternatives for a new section of the Patapsco Regional Greenway in Carroll County. The BRTB invites the public to learn more about these proposed alignments at a public meeting on Thursday, September 30 at 6:00 p.m. Register at

Details about the comment period and how to provide comments are available using the above registration link.

The Sykesville to McKeldin Segment of the Patapsco Regional Greenway consists of two sections - 1) the western portion near downtown Sykesville and 2) the eastern portion near the McKeldin area of the Patapsco Valley State Park.
In spring 2021, a comment period was held to gather feedback on the alignment of each of these trail segments. After reviewing comments, a preferred alternative for each section was selected. Details are below.

The Sandosky Road alignment is a paved shared use path that travels from Main Street in downtown Sykesville, north along Sandosky Road, crossing MD 32 to Raincliffe Road and finally into Freedom Park via the Buttercup Road intersection.


The South Branch alignment begins in Freedom Park and meanders through Patapsco Valley State Park towards the Heart of Maryland Bowhunters Club property. From there, the multi-use trail veers south towards the South Branch of the Patapsco River crossing over the historic Henryton rail tunnel, through the historic Henryton Sanitorium, paralleling Henryton Road, and finally crossing Marriottsville Road before ending in the McKeldin area of the Patapsco Valley State Park.

Elkridge to Guinness Segment of the PRG (Howard County)

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