Dena (in Persian and Lurish: دنا) is the name for a sub range within the Zagros range of West/Southwestern Iran. Dena range, with 80 km length and 15 km average width, is situated on the boundary of the Isfahan, Kohgiluyeh and Boyer-Ahmad and Chaharmahal and Bakhtiari provinces.
Dena has more than 40 peaks higher than 4000 meters. Qash-Mastan is the highest peak in Dena range with an elevation of 4,409 meters above sea level. Other famous peak in this range is Hose-Daal close to Sisakht city, 30 km to the north of Yasuj.
Annual precipitation in Dena range is from 600 to 1800 mm and various rivers including a branch of Karun rise in this range.