Lake Zurich

Lake Zurich is a long glacial lake southeast of downtown Zurich at 406 m a.s.l. It is a prime leisure and transport corridor linking the city with Rapperswil and lakeside towns.

• Length ~40 km, area ~88.7 km², max depth 136 m – the region’s largest waterbody and Zurich’s “home lake”.
• Split into the lower lake and the Obersee by the Seedamm causeway and bridges (1875–1878) at Hurden – a major road and rail crossing.
• Islands of Ufenau and Lützelau near Rapperswil – protected nature sites; Ufenau belongs to Einsiedeln Abbey with regulated access.
• Year-round ZSG services from 1-hour cruises to a ~4.5 h grand tour; the Horgen–Meilen car ferry takes 10 min and has run since 1933.
• The lake froze over completely only in 1929 and 1962/63 – a rare event for the local climate.

• Zurich’s “Seebecken”: promenades from Bürkliplatz to Bellevue, Alpine vistas, piers and Limmat boats.
• Rapperswil with the Seedamm and the wooden footbridge “Holzbrücke Rapperswil–Hurden” (841 m, opened 2001), plus the Ufenau and Lützelau islands.
• The Au Peninsula between Horgen and Wädenswil – vineyards, trails and viewpoints to both shores.

The basin was carved by the Rhine–Linth glacier; the main inflow is the Linth. In 1807–1823, the Linth correction diverted the river via Lake Walen into the Obersee, stabilizing levels and ending floods in the plains.

Prehistoric pile-dwellings once stood on the shallow shores; first finds at Obermeilen were described in 1854. Nine lakeside sites were inscribed in the UNESCO serial property “Prehistoric Pile Dwellings around the Alps” in 2011.

Today’s cross-lake axis took shape with the Seedamm causeway and bridges in 1875–1878. The Horgen–Meilen ferry began in 1933, and in 2001 a new pedestrian wooden bridge between Rapperswil and Hurden revived the medieval crossing line.

Location: Canton of Zurich (with shores in St. Gallen and Schwyz); stretches from central Zurich to Rapperswil and Schmerikon.

Getting there: In Zurich, trams to Bürkliplatz/Bellevue. S-Bahn lines run along both shores; ZSG boats depart from Zürich Bürkliplatz (See) and Zürich Landesmuseum (Limmat).

Access: Promenades and parks are largely step-free. Ufenau has regulated landings and bathing is prohibited at/around the island.

Visiting hours: Year-round. ZSG timetables are seasonal; Limmat boats typically operate April–October.

Visit duration: 1–2 h for a lakeside stroll; Zurich–Rapperswil boat 2–3 h one-way; grand lake tour ~4.5 h.

Best time: May–September for swimming and cruising; clear autumn days for long views; fog is possible in winter.

Notes: Protected zones on the water (especially near Ufenau/Lützelau and Frauenwinkel) – obey navigation and nature-protection rules.