Lechmere is a light rail station and the northern terminus of the MBTA Green Line, located at Lechmere Square in East Cambridge, Massachusetts near the intersection of Cambridge Street and Monsignor O'Brien Highway (Route 28). Green Line trains run around a balloon loop, inside which is a small yard used for midday and overnight storage. The station has two platforms, which are not connected within fare control; the outbound terminus is on the northeast side of the loop and the inbound platform is on the southwest side.