The Ammergau Railway or Ammergaubahn (sometimes called the Ammertalbahn or "Ammer Valley Railway", originally the Lokalbahn Murnau–Oberammergau) is a single-tracked, electrified railway line in Bavaria in southern Germany. It runs from Murnau to Oberammergau, its latter stages following the valley of the river Ammer from which it derives its name. This stub line to Oberammergau branches off at Murnau from the Munich–Garmisch-Partenkirchen main line.