The Schluchsee is a reservoir lake in the district of Breisgau-Hochschwarzwald, southeast of the Titisee in the Black Forest near Freiburg im Breisgau, Germany.

[1] Historical sources also spell it with a diphthong: 983 lacus Sluochse, 1095 Schluochsee, 1125 predium Sluocse, 1312 der sê ze Sluoze.

[1] Thus it cannot be claimed that the name, as is often asserted,[2] from the Middle High German slûch ="pipe, tube" (Alemannic Schluuch), because in this case in the present dialect and the historical sources no diphthong was available.

The Schluchsee, with its height of 930 metres (3,050 ft) above sea level, is the highest reservoir in Germany and also the largest lake in the Black Forest.

The Three Lakes Railway, an extension of the Höllentalbahn, runs from Titisee station along the northern shore to the terminus at Seebrugg.

Excessive alcohol consumption, card games and other escapades showed the subsequent world runners-up in a bad light.

[7] In 1983 almost all the water in the reservoir was drawn down for inspection purposes, rendering the normal swimming, fishing and sailing activities impossible.

[8] The Schluchsee is surrounded by a plethora of hiking trails and the entire lake can be circumnavigated on foot along an 18-kilometre-long path which is largely flat and suitable for prams.