The Fedchenko Glacier is approximately 77 kilometres long. It is located in the Pamir Mountains of Tajikistan, in the Gorno-Badakhshan Autonomous Province.
Fedchenko is a long, narrow valley glacier in the Yazgulem Range. It flows generally northward from high elevations near Independence Peak and eventually melts into the Balandkiik River. Its meltwater continues through the Muksu, Vakhsh and Amu Darya river systems before reaching the Aral Sea basin.
The glacier is widely described as the longest glacier outside the polar regions, although exact measurements can vary depending on whether tributary ice is included and which survey methods are used. Modern references commonly give a length of about 77 kilometres, making the stored answer appropriate for a quiz.
Fedchenko was named for the Russian explorer Alexei Fedchenko. The glacier can reach roughly 1,000 metres in ice thickness in places, and its elevation changes dramatically along its course. Rockfall debris covers parts of the lower glacier, while the upper section remains dominated by snow and clean ice. It is an important water reservoir in an otherwise arid region of Central Asia.