MARC Train

"MARC" redirects here. For other uses, see Marc. For the given name, see Marc (given name). For the surname, see Marc (surname).

Maryland Area Regional Commuter
A MARC HHP-8 leads an express train into Odenton station in Odenton, Maryland
Overview
Owner	Maryland Transit Administration
Locale	Baltimore–Washington metropolitan area
Transit type	Commuter rail
Number of lines	3
Number of stations	42
Daily ridership	20,800 (weekdays, Q2 2026)
Annual ridership	5,222,500 (2025)
Chief executive	Tony Bridges
Website	mta.maryland.gov/marc-train
Operation
Began operation	1984 (1984) (as Maryland Rail Commuter)
Operators	Alstom (Camden and Brunswick Lines) Amtrak (Penn Line)
Reporting marks	MARC
Infrastructure managers	Amtrak, CSX
Technical
System length	187 mi (301 km)
Track gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Electrification	Overhead line, 12 kV 25 Hz AC (Penn Line)
Top speed	125 mph (201 km/h)
System map  Brunswick Line  Floridian to Chicago Martinsburg Duffields Harpers Ferry West Virginia Maryland Potomac River South Mountain Tunnel Brunswick Catoctin Tunnel Point of Rocks Tunnel Point of Rocks Monocacy Frederick Monocacy River Dickerson  Penn Line  Barnesville Amtrak Boyds Perryville Germantown Susquehanna River Metropolitan Grove Aberdeen Gaithersburg Bush River Washington Grove Edgewood Rockville Gunpowder River Garrett Park Martin Airport Kensington Back River Silver Spring Union Tunnel Penn Station B&P Tunnel West Baltimore  Camden Line  Frederick Road closed 1984 Camden Station Halethorpe Gwynns Falls St. Denis Patapsco River Patapsco River Elkridge closed 1996 Dorsey BWI Airport Jessup Savage Odenton Laurel Race Track Patuxent River Bowie State Laurel Bowie closed Muirkirk Seabrook Greenbelt Lanham closed Berwyn closed 1991 Capital Beltway closed College Park New Carrollton Riverdale Landover closed Hyattsville closed c. 1980s Maryland Washington, D.C. Northwest Branch Anacostia River Anacostia River Maryland Washington, D.C. Union Station Virginia Railway Express Amtrak Key Penn Line Camden Line Brunswick Line

The Maryland Area Regional Commuter (MARC) is a commuter rail system in the Washington–Baltimore area. MARC (reporting mark MARC) is administered by the Maryland Transit Administration (MTA) and operated under contract by Alstom and Amtrak on track owned by CSX Transportation (CSXT) and Amtrak. In 2025, the system had a ridership of 5,222,500, or about 20,800 per weekday as of the second quarter of 2026.

Trains on the Penn Line can travel 125 miles per hour (201 km/h), higher than any other commuter railroad in the United States.