Mount Dena is the highest peak of the Zagros Mountains, reaching about 4,409 metres in southwestern Iran.
Dena is a long mountain subrange rather than a lone isolated summit. It extends through Kohgiluyeh and Boyer-Ahmad Province and contains many peaks, with Qash-Mastan commonly identified as its highest point.
The Zagros formed through the collision of the Arabian and Eurasian tectonic plates. Continued compression folded and uplifted thick layers of sedimentary rock, creating the long parallel ridges that characterize the range.
Mount Dena is often confused with Mount Damavand, Iran’s highest mountain. Damavand is taller and volcanic, while Dena is the highest part of the Zagros system and belongs to a different geological setting.