 The Colmar Manor Community Park was established along the west bank of the Anacostia River in the 1970s on the site of a sanitary landfill.In 1999, Colmar Manor, Bladensburg, and Cottage City were lauded by the Joint Center for Sustainable Communities for their collaboration with Prince George's County for the Port Towns Revitalization Initiative, which created a common Port Towns identity for the towns; encouraged businesses development through infrastructure and facade improvements; acquisition of historic properties and plans for their reuse; and reconstruction of the Bladensburg waterfront and marina.Colmar Manor is located at 38°56'2" North, 76°56'49" West (38.933811, -76.947077).