Cedar Grove is a station on MBTA's Ashmont–Mattapan High Speed Line, a branch of the Red Line. The station is located at Adams Street and Milton Street in the Dorchester neighborhood of Boston, Massachusetts. Cedar Grove consists of two side platforms which serve the Ashmont–Mattapan High Speed Line's two tracks. It is located near Cedar Grove Cemetery, which the Ashmont–Mattapan High Speed Line runs through. The station was opened in 1929, as was the rest of the line. Cedar Grove was closed on June 24, 2006, for a yearlong renovation of the Ashmont–Mattapan High Speed Line.