Dyleň (German: Tillenberg) is a mountain in the Karlovy Vary Region of the Czech Republic.

At 940 metres (3,080 ft) above sea level, its summit is the second-highest peak in the Upper Palatinate Forest.

Local tradition holds that Napoleon Bonaparte declared Tillenberg the geographical midpoint of Europe in 1813.

[1] The German name provided the title of the epic poem Der Tillenberg: Ein Sagenschatz aus dem Egerlande (A Treasury of Tales from the Egerland) published in 1904 by Ernst Freimut (pseudonym of Johann (Hans) Sommert).

[2] On the summit is a set of prominent buildings, which were used by the Soviet Union for electronic espionage into Germany during the Cold War.