Üetliberg, Mountain summit in Zürich, Switzerland.

Üetliberg is a mountain near Zürich that rises to about 869 meters and stands noticeably above the city landscape. From the summit, you can see Zürich below, the lake stretching out, and on clear days the distant Alps.

The name derives from the Uetliburg, a refuge castle documented since the 10th century and first recorded as Uͦtelenburh in the early 13th century, from the Alemannic personal name Uotilo. Six castles stood on the Uetliberg and neighbouring Albis ridge in the Middle Ages, including Uetliburg, Friesenberg, Baldern and Manegg; only traces remain. In 1267 Zürich's forces under Rudolf von Habsburg are said to have destroyed the Uetliburg during the Regensberg feud, though this is not historically certain.

The name Uto, used for the summit and its hotel Uto Kulm, comes from Friedrich Gottlieb Klopstock's 1750 ode "Der Zürchersee". The Uto section of the Swiss Alpine Club took its name from the mountain, and gave it in turn to Uto Peak in Canada's Selkirk Mountains. The farm Alt Uetliberg, documented around 1620, now serves as a scout hut.

The summit is reached year-round by S10 trains from Zürich HB, which run every half-hour and take 20 minutes to Uetliberg station, 68 m below the top. On foot, paths climb from Albisgüetli, Triemli and Albisrieden, with water fountains along the way. A downhill mountain-bike track runs from the camping area at the top to Triemli station.

Between this summit and Felsenegg lies the Planet Trail, a walking path that shows the solar system as a scale model and takes about two hours to complete. This route connects two mountain peaks while offering a learning experience about space for all ages.