Gleesberg, Mountain summit near Schneeberg, Germany.

Gleesberg is a mountain near Schneeberg in eastern Germany, rising to about 593 meters and situated between the towns of Aue and Schneeberg. Hiking trails wind through the wooded slopes, offering access to the surrounding landscape.

The name likely derives from the Middle High German glosen or glösen, meaning to shimmer or gleam, referring to the mountain's mica-rich rock. In summer 1879 the Erzgebirgszweigverein Schneeberg-Neustädtel built a 13-metre wooden lookout tower on the summit; it was demolished as unsafe and replaced by an 18-metre tower completed on 2 October 1898 to plans by architect R. Unger. The tower is named after Dr. Ernst Köhler, founder of the Erzgebirgsverein, whose portrait decorates the entrance.

The mountain's name likely comes from the Middle High German glosen or glösen, meaning to shimmer or glisten, a reference to the abundant mica in its rock. The inn beside the tower kept Stammtischecken, corner tables reserved for villagers from Zschorlau, Aue and Oberschlema, decorated with old town views and craft tools; they reportedly survived until 1994.

Several hiking trails cross the mountain terrain with varying difficulty levels to suit different abilities. The best time to visit is from spring through autumn when the paths are most accessible.

At the mountain's base flows the Gleesbergquelle, a natural spring rich in radon that serves therapeutic purposes. The water is drawn to the nearby Schlema spa facility for wellness treatments.