Jona

The Jona rises on the eastern slope of Bachtel hill near Gibswil and Fischenthal in the Zürcher Oberland. Passing an impressive waterfall, the river flows near the municipality of Wald through a little valley eastward and changes its direction to the south by a ravine, which a viaduct of the Tösstalbahn is crossing. The Jona turns to the west, dividing the municipalities Dürnten and Rüti, passing the village of Tann and Rüti in the so-called Tannertobel. Once again, it changes its direction, flowing to the south through Rüti and the so-called Joner Wald , followed by the S-Bahn Zürich lines S5 and S15. The river underneaths here Oberland Autobahn , now reaching the canton of St. Gallen and Rapperswil-Jona, flowing nearly in straight direction through the village of Jona . Finally, it forms a small river delta near Busskirch and flows at Stampf lido in the Obersee, the upper section of the Zürichsee.

The river's name was first mentioned in 834 AD, the former municipality Jona was named much later. It is assumed that the name originates as either Celtic Jauna – the Jona is still largely determined by forest area – or, as Indo-European yamam, meaning stream. Latest interpretations say that the Indo-European word jeu roughly means to move, followed by the Old High German name Jouna .

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