The Fann Mountains, located in the north-western part of Tajikistan,

form a prominent subrange of the western Pamir-Alay mountain system. Situated primarily within the Sughd Region, this range lies between the Zarafshan and Gissar ranges and spans approximately 150 kilometres in length. The Fann Mountains are distinguished by their rugged peaks, many of which exceed 5,000 metres. The highest point is Chimtarga Peak, rising to 5,489 metres above sea level, making it one of the tallest summits in the region.
Geologically, the range is composed predominantly of sedimentary and metamorphic rocks, including limestone, sandstone, and schist, dating from the Paleozoic era. This geological composition has contributed to the formation of sharp ridges, deep valleys, and numerous glacial cirques. The region is also notable for its seismic activity due to its location along the complex tectonic boundaries of the Eurasian and Indian plates.
Hydrologically, the Fann Mountains are the source of several rivers, including tributaries of the Zeravshan River. The range also hosts more than 30 alpine lakes, the most prominent being Lake Iskanderkul, situated at 2,195 metres. These lakes are fed by snowmelt and glacial runoff, contributing to the area's diverse hydrological systems.
Climatically, the range experiences cold winters and dry, warm summers. Precipitation is largely confined to the winter and spring months, with snow cover persisting at higher elevations throughout the year. The region supports diverse flora and fauna, particularly within the alpine and subalpine zones, some of which are endemic to Central Asia.