Wakhan River in the context of "Qalʽeh-ye Panjeh"

The Panj, traditionally known as the Ochus River, is a river in Afghanistan and Tajikistan and a tributary of the Amu Darya. The river is 921 kilometres (572 mi) long and has a basin area of 114,000 square kilometres (44,000 sq mi). It forms a considerable part of the Afghanistan–Tajikistan border.

The river is formed by the confluence of the Pamir River and the Wakhan River near the village of Qalʿa-ye Panja (Qalʽeh-ye Panjeh). From there, it flows westwards, marking part of the border of Afghanistan and Tajikistan. After passing the city of Khorugh, capital of the Gorno-Badakhshan Autonomous Region of Tajikistan it receives water from one of its main tributaries, the Bartang River. It then turns towards the southwest, before joining the river Vakhsh and forming the greatest river of Central Asia, the Amu Darya. The Panj played an important role during Soviet times, and was a strategic river during the Soviet military operations in Afghanistan in the 1980s.

The Pamir River is a shared river located in the Badakhshan Province of Afghanistan and in the Gorno-Badakhshan in Tajikistan. It is a tributary of the Panj River, and forms the northern boundary of Afghanistan's Wakhan District.

The river has its sources in the Pamir Mountains in the far eastern part of Gorno-Badakhshan, Tajikistan. It flows between the Alichur mountain range in the north and the Wakhan District in the south. It starts from the Lake Zorkul, at a height of 4,130 meters, and then flows west, and later southwest. Near the town of Langar, at 2,799 m, its confluences with the Wakhan River forms the Panj River. The Pamir forms the boundary between Afghanistan and Tajikistan along its entire length. Northwest of Langar is the 6,726 m (22,067 ft) high Karl Marx Peak and Friedrich Engels Peak (6,507 m (21,348 ft)). A road runs along the river on the Tajik side to Khargush where it turns north to join the Pamir Highway. A road of lower quality continues east past Zorkul, almost to the Chinese border.

Langar is a village in the Wakhan District of Badakhshan Province, in north-eastern Afghanistan. It lies on the river Panj, opposite the larger village of Toqakhona in Tajikistan.

The place should not be confused with a seasonal settlement called Langar, also in Wakhan, on the upper Wakhan River, some 130 km east.

The Little Pamir (Wakhi: Wuch Pamir; Kyrgyz: Kichik Pamir; Persian: پامیر خرد, romanized: Pāmīr-e Khord) is a broad U-shaped grassy valley or pamir in the eastern part of the Wakhan in north-eastern Afghanistan. The valley is 100 km long and 10 km wide, and is bounded to the north by the Nicholas Range, a subrange of the Pamir Mountains.

Chaqmaqtin Lake (17 km by 3 km) lies towards the western end of the valley while the Tegerman Su valley lies at its easternmost end. The Aksu or Murghab River flows east from the lake through the Little Pamir to enter Tajikistan at the eastern end of the valley. The Bozai Darya (also known as the Little Pamir River) rises a short distance west of the lake, and flows 15 km west to join the Wakhjir River and form the Wakhan River near the settlement of Bozai Gumbaz.