The Metropolitan Branch Trail (informally, the Met Branch Trail) is an American rail trail that, when completed, will run eight miles (13 km) from the transit center in Silver Spring, Maryland, to Union Station in the District of Columbia. It serves to extend the Capital Crescent Trail where it merges with the active WMATA and CSX railroad tracks into the National Capital. At Fort Totten, a connector trail to the Northwest Branch Trail of the Anacostia Tributary Trail System at Hyattsville, Maryland, will be constructed; and an on-street connection to the National Mall will be constructed from Union Station. When completed, the Metropolitan Branch Trail will serve as part of the East Coast Greenway.