The Vtáčnik Mountains (Slovak: Pohorie Vtáčnik) are a mountain range in central Slovakia, which forms part of the Slovak Central Mountains (Slovenské stredohorie) within the Inner Western Carpathians. It is bordered in the west, north and northeast by the upper Nitra basin, Strážov Mountains and Žiar, in the east by the Kremnica Mountains and Žiar basin, and in the south by Tribeč and the Štiavnica Mountains. It is divided further into these geomorphological units: The four highest mountains are: (1,346 m), Biela skala (1,136 m), Buchlov (1,040 m), and Žiar (845 m).