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Lake Zug (German:Zugersee) is a lake inCentral Switzerland, situated betweenLake Lucerne andLake Zurich. It stretches for 14 km (8.7 mi) betweenArth and theCham-Zug bay. TheLorze as the main feeder river empties its waters into the lake at its northern extremity, but 1 km (0.6 mi) further west issues from the lake to pursue its course towards theReuss. Due to this poor feeding, Environmental protection is very important as the lake would suffer long term damage if polluted as the second of the rivers,Rigiaa, feeds only a marginal amount into the lake at its southern end. Already a great part of the fauna in the deep parts of the lake has been lost.
The lake is mostly within the borders of theCanton of Zug, with about 10 square kilometres (3.9 sq mi) at its southern end in the cantonSchwyz, while theCanton of Lucerne claims about 2 km2 (0.77 sq mi) to the north ofImmensee. Toward the south-west extremity of the lake theRigi descends rather steeply to the water's edge, while part of its east shore forms a narrow level band at the foot of the 1,583 m (5,194 ft)Rossberg, and theZugerberg. The culminating point of the lake's drainage basin is the summit of the Rigi at 1,798 m (5,899 ft).[1]
At its northern end, the shores are nearly level, while on the west shore the wooded promontory of Buonas (with its castles, old and new) projects picturesquely into the waters. The principal place on the lake is the town ofZug. Three railways follow the shore of the lake, one fromZürich via Zug andArth-Goldau toSaint-Gotthard, one fromLucerne via Arth-Goldau to Saint-Gotthard, and the third from Zürich via Zug to Lucerne.
Many fish (includingpike andcarp of considerable weights) are taken in the lake, which is especially famous for anendemic kind oftrout (Salmo salvelinus, locally calledRolheli).[2]
The firststeamer was placed on the lake in 1852.[2]
In the early 20th century, a railway (formerly part of theSt. Gotthard main route) ran along its eastern shore pastWalchwil toArth at its south end, which was connected initially by a steamtramway with theArth-Goldau station of the St. Gotthard line. This line runs fromArth along the western shore to Immensee, where it bears south-west to Lucerne, while from Immensee another railway leads (at first some way from the shore) toCham, 5 kilometres (3 mi) west of Zug.[2]