Weitsee is a small lake on between Reit im Winkl and Ruhpolding with an area of 63.60 ha and a maximum depth of 9.30 m. The lake itself is separated in a shallow western and a deeper eastern part by a mountain halfisland. It is the first lake in the Dreiseengebiet (Three Lake Area) followed by the Mittersee and Lödensee. The lakes are located in the valley between the Gurnwandkopf und Dürrnbachhorn next to the Deutsche Alpenstraße B305 (German Alpine Street). Only a few small tributary bring water to the lake most of the water comes from a 5 m deep spring which is located at the nearrowest part of the lake. All the watter from the outflow of the lake ends in seepage at the end of the Lödensee after it has gone through Mittersee.