Kohgiluyeh and Boyer-Ahmad Province is one of the thirty-one provinces of Iran. It is in the south-west of the country, in Iran's Region 2, and its capital is Yasuj. The province covers an area of 15,563 square kilometers, and in 2006 had a population of 634,000. According to National Population and Housing Census population of Kohgiluyeh and Boyer-Ahmad in 2011 was 658,629. The people mainly speak Lurish language. The counties of Kohgiluyeh and Boyer-Ahmad Province are Bahmai County, Landeh County, Boyer-Ahmad County, Charam County, Dana County, Basht County & Gachsaran County.
The province is mostly mountainous in terrain, part of the Zagros range. The highest point is the Dena summit with a height of 5,109 meters.
The mountain range of Dena, with more than 20 elevations and over 4000 meters high above the sea level, is, in fact, the great Himalayas in miniature. The mountain range, which is located in Kohgiluyeh va Buyer Ahmad province, is covered with oak forests. Natural springs, singing of the birds, and fresh air fascinate all lovers of nature. Another mountain is Khamin or Khami that is located in Gachsaran country.