|Max. depth||17 metres (56 ft)|
|Surface elevation||1,036 metres (3,399 ft)|
The Mummelsee is a 17-metre-deep lake at the western mountainside of the Hornisgrinde in the northern Black Forest of Germany. It is very popular with tourists travelling along the Schwarzwaldhochstraße. According to legends, the lake is inhabited by a Nix and the King of the Mummelsee.