This trail from the 2000 Maryland Greenways Commission (#2 on the list):
The Indian Head to White Plains Rail Trail is a potential trail along a rail corridor currently owned by the U. S. Naval Ordnance Station at Indian Head. Discussions about the potential trail have been held with the Navy and public officials. Currently, the tracks are used only for a dinner train, but the Navy wishes to maintain the option of utilizing the tracks for future rail needs; a rail-with-trail is an option. The rail corridor begins in White Plains and runs due west, approximately 12.5 miles to the town of Indian Head. It connects to DNR’s Mattawoman Natural Environment Area.
The National Park Service has given Charles County a 160-acre abandoned railroad corridor that the county plans to develop into a walking and bicycling trail through western Charles between White Plains and Indian Head.
The old rail right of way, which stretches for 13.4 miles and is valued at more than $3 million, was transferred to the county at no cost through the Park Service's Federal Lands to Park program, the county government announced last week.
The proposed trail is part of plans to create a countywide trail and greenway system that provides a continuous pedestrian pathway between the county's center and the Potomac River at Mattawoman Creek.
Charles's Department of Public Facilities is managing the project and expects to begin removing steel and wooden fixtures from the rail corridor early next year. Revenue from salvaging those materials will help fund the trail construction. County officials expect to open the first portions of the trail within a year.