"Dena Peak or the Dena Mountain Range is considered the tallest and largest subrange of the Zagros Mountain Range, with an approximate length of 90 kilometers. The name of this mountain range is derived from the ancient city of Dehnar (Deh Anar) located in the southwestern foothills of the mountain, where the ruins of this city are visible near the villages of Khungah and Dasht-e Riz in the Dena County.
The Dena Mountain Range is located in the provinces of Isfahan, Kohgiluyeh and Boyer-Ahmad, and it is one of the 1,515 prominent mountain peaks worldwide. The Dena Mountain Range has 52 peaks over 4,000 meters in elevation, and the majority of the highest peaks over 4,000 meters in Iran belong to this mountain range.
Contrary to common belief, Dena is not a single peak; rather, it is a mountain range in the Zagros region that stretches from northwest to southeast, straddling the three provinces of Isfahan, Kohgiluyeh and Boyer-Ahmad, and Chaharmahal and Bakhtiari. It is divided into three main ridges and one subsidiary ridge, separated by the three passes of Bijan, Morgol-e Gharbi, and Pootak.
Dena starts approximately 20 kilometers east of Yasuj and continues up to 70 kilometers northwest in the Isfahan province. The highest peak of the Dena Mountain Range is Mount Bijan 3 (Qashmastan) on the border of the Paden-e Samiram area and the city of Sisakht, with an elevation of 4,459 meters, located about 35 kilometers northwest of Yasuj. The Paden-e Samiram area and the city of Sisakht are situated at the base of this mountain. Due to its considerable length and varying elevations, annual precipitation in this mountain ranges from 600 to 1800 millimeters, giving rise to numerous rivers, including Bashar, Kharsan, Rigan, Marbar, Mehryan, Kooh Gol, Diyashm, Siriz, Tizab, and Dezgard, among others.
The eastern boundary of the Dena Protected Area begins north of the city of Sisakht, which serves as the administrative center of Dena County. Some of the important environmental protection outposts include Kharehidoon, Koreh, Ab Sepah, and Mimanad. The Dena Protected Area, with an area of approximately 93,821 hectares, is located in the southwestern part of the country in the Kohgiluyeh and Boyer-Ahmad province, with geographical coordinates of E5121 latitude and N3057 longitude.
On the other hand, the Dena region has numerous valleys, many of which are filled with small and large springs. Many of these springs emerge from beneath the snow, flow down from the steep slopes of Dena, and eventually join to form the cool, sweet, and clear rivers of Bashar...
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