The Sihlwald is a forest and nature reserve in the Sihl Valley of the Swiss canton of Zürich.
It is a rare example of a large-scale and original forest, situated on the eastern slopes of the Albis hills to the west side of the Sihl river.
[1][2][3][4][5] The city of Zürich received the Sihl forest, or Sihlwald, as a gift in 1309 from the Hapsburgers and again in 1524 through the dissolution of the Fraumünster convent.
On August 28, 2009, the Federal Office for the Environment declared the Sihl forest a "regional nature park of national importance".
[4][5][6][7] The forest can be reached via the Sihlwald railway station, served by service S4 of the Zurich S-Bahn.