The Draining Lake (Icelandic: Kleifarvatn) is a 2004 crime novel by Icelandic author Arnaldur Indriðason, an entry in the Detective Erlendur series.

The title is based on a real Icelandic lake Kleifarvatn, which began draining away in 2000 following an earthquake.

In the novel, the dropping water level reveals a body long hidden in the lake.

The Guardian reviewed the book as being one of the best modern crime fiction novels.

[1] The book won the Barry Award for the best crime novel in 2009.