Sihl rises at Drusberg near Hoch-Ybrig in the canton of Schwyz, passes the 8.5 km (5.3 mi) long Sihlsee near Einsiedeln, Sunnegg near Biberbrugg and Schindellegi.
Now it enters the canton of Zurich, nearby Samstagern passing Hütten and the rapid called Sihlsprung situated in Schönenberg, flowing through the valley between the Zimmerberg and Albis chains.
[3] Sihltal is a well-known recreation area and popular for hiking and biking tours along Sihl and in the surrounding hills between the chains of Höhronen, Albis-Felsenegg and Zimmerberg.
This region includes the municipalities respectively villages of Adliswil, Hirzel, Horgen, Hütten, Kilchberg, Langnau am Albis, Oberrieden, Richterswil, Rüschlikon, Samstagern, Schönenberg, Sihlbrugg, Thalwil and Wädenswil.
The lower Sihl valley has an excellent local transportation network: Zimmerberg bus line (Zimmerbergbus) and Sihltal Zürich Uetliberg Bahn (SZU) are providing the local public transportation in the Sihl valley, in addition to the Luftseilbahn Adliswil-Felsenegg (LAF for short or commonly Felseneggbahn), an aerial tramway connecting Adliswil and Felsenegg.