The Harsimus Stem Embankment, also called Sixth Street Embankment, is a half-mile-long historic railroad embankment, now abandoned and largely overgrown with foliage, in the heart of the historic downtown of Jersey City, New Jersey in the United States. The 27-foot-high (8.2 m) embankment runs along the south side of Sixth Street west from Marin Boulevard to Brunswick Street. It is the border between the Harsimus and Hamilton Park neighborhoods. The overhead tracks of the beam bridge west of Brunswick Street were dismantled but the stone abutments remain.