Glöckner, Mountain summit in the Thuringian Forest, Thuringia, Germany

Glöckner is a mountain in the Wartburgkreis in the Thuringian Forest with two rocky summits of 702.5 m and 692 m, surrounded by block fields. It lies on the Rennsteig and is a popular viewpoint. On the lower crag stands the Rennsteig memorial to members of the Rennsteigverein who fell in the First World War, alongside rock groups bearing inscriptions.

The name originated in medieval times and likely refers to the mountain's shape, a common practice in German geography. Such high points served as natural reference markers for regional settlement patterns.

The name Glöckner probably derives from an older form, Klöckler. On the lower rocky summit stands the Rennsteig-Ehrenmal, a memorial to members of the Rennsteigverein who fell in the First World War, with a list of their names carved into the western rock group. A granite stone also bears the name of the Rennsteig researcher Elisabeth Streller (1879–1939).

The summit is reachable from several hiking routes, with the eastern path offering a gentler ascent for most visitors. The trails are accessible throughout the year, though spring and autumn provide the most comfortable conditions.

On the lower rocky summit (692 m) stands the Rennsteig memorial to members of the Rennsteigverein who fell in the First World War, alongside rock faces carved with inscriptions. Among them is a granite stone bearing the name of pedagogue Friedrich Fröbel, chiselled from the 1860s at his widow's request.