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Monasterolo del Castello (Bergamasque: Monastaröl) is a comune (municipality) in the Province of Bergamo in the Italian region of Lombardy, located about 70 kilometres (43 mi) northeast of Milan and about 20 kilometres (12 mi) northeast of Bergamo. Monasterolo del Castello borders the following municipalities: Adrara San Martino, Adrara San Rocco, Casazza, Endine Gaiano, Fonteno, Grone, Ranzanico, Spinone al Lago.

Lake Endine (Italian: Lago d'Endine) is a lake of the Province of Bergamo, Lombardy, Italy. Covering an area of 2.1 square kilometres, it is formed by the Cherio River at an altitude of 337 metres in the Val Cavallina. The lake lies in the territories of the municipalities of Endine Gaiano, Monasterolo del Castello, Ranzanico and Spinone al Lago.

Ranzanico (Bergamasque: Ransaních) is a comune (municipality) in the Province of Bergamo in the Italian region of Lombardy, located about 70 kilometres (43 mi) northeast of Milan and about 25 kilometres (16 mi) northeast of Bergamo. Ranzanico borders the following municipalities: Bianzano, Endine Gaiano, Gandino, Monasterolo del Castello, Peia, Spinone al Lago.

Endine Gaiano (Bergamasque: Ènden Gaià) is a comune (municipality) in the Province of Bergamo in the Italian region of Lombardy, located about 70 kilometres (43 mi) northeast of Milan and about 25 kilometres (16 mi) northeast of Bergamo.Endine Gaiano borders the following municipalities: Fonteno, Gandino, Monasterolo del Castello, Ranzanico, Solto Collina, Sovere.