Mattapan station is an MBTA light rail station in Boston, Massachusetts. It is the southern terminus of the Ashmont–Mattapan High-Speed Line, part of the Red Line, and is also an important MBTA bus transfer station, with eight routes terminating there. It is located at Mattapan Square in the Mattapan neighborhood. At the station, streetcars use a balloon loop to reverse direction back to Ashmont station. Mattapan station is fully accessible, with mini-high platforms.

Capen Street station is a light rail station in Milton, Massachusetts. It serves the MBTA Ashmont–Mattapan High Speed Line. It is located on Capen Street off Eliot Street; the westernmost of the four MBTA stations in Milton, it consists of two side platforms flanking the eponymous street's grade crossing. The platforms are staggered to allow trains to make the stop at Capen Street before crossing the street itself, as there is no signal at the grade crossing. Capen Street is accessible via wooden ramps on both platforms. Capen Street opened in September 1930 as an infill station on the line.