What is Lake Zug?
{{Infobox lake |lake_name = Lake Zug <br> Zugersee |image_lake = Aussicht Winter Rigi Zugersee.jpg |caption_lake = |image_bathymetry = Karte Zugersee.png |caption_bathymetry = Map |coords = {{coord|47|7|N|8|29|E|type:waterbody_region:CH}} |type = |inflow = [[Lorze]] |outflow = [[Lorze]] |catchment = [[1 E+8 m²|204 km²]] (79&nbsp;mi²) |basin_countries = Switzerland |length = 13.8 km (8.6&nbsp;mi) |width = 4.7 km (2.9&nbsp;mi) |area = [[1 E+7 m²|38.3 km²]] (15&nbsp;mi²) |depth = 83.2 m (293&nbsp;ft) |max-depth = 198 m (650&nbsp;ft) |volume = [[1 E+9 m³|3.2 km³]] |residence_time = 14.7 years |shore = |elevation = 417 m (1,368 ft) |islands = |cities = ''see [[#List of cities and places on the lake|list]]'' }} The '''Lake Zug''' ([[German language|German]]: ''Zugersee'') is one of the lesser known [[Switzerland|Swiss]] [[lake]]s, on the outskirts of the [[Alps]] and north of [[Lake Lucerne]]. It is fed by the [[Aa River|Aa]], which descends from the [[Rigi]] and enters the south end of the lake. The [[Lorze]] feeds the lake at the northern shore. For the most part, the lake is in the [[Canton of Zug]], but the southern end is up to 10&nbsp;km in the canton of Schwyz, while the [[Canton of Lucerne]] stretches over a 2&nbsp;km area by the [[Immensee]]. 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 of [[Zug]]. Three railways follow the shore of the lake, one from [[Zürich City|Zürich]] via Zug and [[Arth-Goldau]] to the [[St. Gotthard|St Gotthard]], one from [[Lucerne]] via Arth-Goldau to the St Gotthard and one from Zürich via Zug to Lucerne. Many fish (including [[pike (fish)|pike]] and [[carp]] of considerable weights) are taken from the lake, which is especially famous for an [[endemic (ecology)|endemic]] kind of [[trout]] (''Salmo salvelinus'', locally called ''Rolheli''). Because of farming runoff, it is not one