The Gold Line is a light rail transit line in the Sacramento Regional Transit District (SacRT) light rail system. Operating between Sacramento Valley and Historic Folsom stations, the line runs primarily east-west in Sacramento (including downtown, Midtown, East Sacramento), portions of unincorporated Sacramento County, Rancho Cordova, Gold River and Folsom. Segments of the Gold Line run along the system's original alignment between 16th Street and Butterfield stations, which opened for service in 1987. The line has run in its modern configuration since June 2005, with extensions completed since then to Folsom and the downtown Amtrak station.