The Engadin or Engadine is a long high Alpine valley in the eastern Swiss Alps. It is found in the canton of Graubünden. It is about 25,000 inhabitants. It follows the route of the Inn from its headwaters at Maloja Pass in the southwest running roughly northeast until the Inn flows into Austria, one hundred kilometers downstream. The Inn subsequently flows at Passau into the Danube, as the only Swiss river to drain into the Black Sea.