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 into a shallow western and a deeper eastern part by a mountain peninsula.

The lakes are located in the valley between the Gurnwandkopf und Dürrnbachhorn next to the Deutsche Alpenstraße B305 (German Alpine Street).

Geological research showed that the water finds its way under the Hochgern mountain to the bog near Bergen, Upper Bavaria.

The lake with its beach, the clean water and the distance to the next village attract many people in summer.

In the winter the cross-country ski run between Reit im Winkl and Ruhpolding crosses the lake.