This area, one of the Iranian historical game reserves, has been protected since 1970s especially to preserve the urial population and its plant diversity. It was the promoted to wildlife refuge in 2002. Having an of 46865 ha, the refuge is Razavi Khorasan Province in the western side of the Binalood mountain ranges. It is a mountainous region with frequent hill and rather deep valleys, deriving its name from the village of Heidary and valley with the same name. The altitude range of 1380-2940 m and mean annual and temperature of 300 mm and 12 C, respectively have resulted in temperate semi-arid and warm Mediterranean climate.

The occurrence of young juniper stands and their natural regeneration are among the unique characteristic of the area. Other plant species include hedge maple, nettle tree, oleaster, willow, tamarisk, astragal, willow, tamarisk, astragal, wormseed, barberry, glaint fennel, cotoneaster, plantain, mifoil, asphodel, camel’s thorn prickly thrift and orchis. The high population of the largest urials of the region. Wolf, wils boar, leopard, common fox, hyena, wild cat, marten, Indian crested porcupine, golden eagel, falcon, peregrine falcon, chukar partridge, see-see partridge, rock thrush, straling, vulture, different buzzards and sandgrouses are among the most important animal species, stunning landscapes, rich wildlife, frequent springs and proper access roads have roads have made possible possible scientific, research and tourist activities.