The Siebengebirge(German pronunciationⓘ), occasionally Sieben Mountains or Seven Mountains, are a hill range of the German Central Uplands on the east bank of the Middle Rhine, southeast of Bonn.

The area, located in the municipalities of Bad Honnef and Königswinter, consists of more than 40 hills.

The hills are of ancient volcanic origin and came into being between 28 and 15 million years ago.

The highest peak is the Ölberg at 460 metres above sea level.

It is a popular tourist destination for hiking, because of its natural environment.