Pakistan Glaciers: The Complete Guide to the Third Pole’s Greatest Ice Giants

The Siachen Glacier in the eastern Karakoram is the longest glacier in Pakistan and the second longest non-polar glacier in the world, after the Fedchenko Glacier in Tajikistan. Stretching 76 kilometres from its origin at Indira Col at 5,753 metres down to its terminus at 3,620 metres, Siachen and all its tributary glaciers together cover an area of approximately 700 square kilometres. The name comes from the Balti language: sia refers to the wild rose species that grows in abundance beside the glacier, and chen means any object found in great quantity. The glacier is thus, beautifully, “the place where roses grow in abundance.”

Average winter snowfall at Siachen exceeds 10 metres, and temperatures can fall to minus 50°C at the higher elevations. The glacier feeds the Nubra River which flows into the Shyok, which in turn drains into the Indus. Siachen’s meltwater travels the entire length of Pakistan before reaching the sea, sustaining agriculture and communities for thousands of kilometres downstream. The glacier is currently inaccessible to civilian visitors due to its status as a militarised zone in a territorial dispute, but it remains one of the most geologically significant features in South Asia.

The Baltoro Glacier is the most celebrated glacier in Pakistan and arguably the most famous trekking glacier in the world. Located in the Baltoro Muztagh sub-range of the Karakoram, it flows 63 kilometres from the peaks surrounding Concordia down to its snout near Askole. Along its length, four of the world’s fourteen eight-thousanders rise directly from its edges or the ridges immediately above it: K2 (8,611m), Gasherbrum I (8,080m), Broad Peak (8,051m), and Gasherbrum II (8,035m). Mountaineers have called Concordia, the point where the Baltoro meets the Godwin-Austen Glacier at the foot of K2, the “Throne Room of the Mountain Gods.”

The Baltoro is classified as a valley glacier, flowing through a trough carved by the same glacial process over millions of years. Its surface is largely covered with a layer of rock debris called a moraine, which gives it its grey, rocky appearance when viewed from above. Beneath that debris the ice is deep and ancient, some of it hundreds of years old. The glacier moves approximately 70 centimetres per day, creeping slowly but measurably toward its snout. For trekkers on the approach to K2 Base Camp, walking the Baltoro is one of the most extraordinary physical journeys available anywhere on Earth.

The Biafo and Hispar glaciers connect at Snow Lake (Lukpe Lawo) at 4,800 metres to form a continuous ice corridor of approximately 120 kilometres, the longest glacial highway outside the polar regions. The Biafo runs 67 kilometres through the Karakoram from Hispar Pass down to Askole, while the Hispar runs 49 kilometres in the opposite direction through the Hispar Valley in Nagar to the Hunza side. Between them lies Snow Lake, a vast, flat, high-altitude snowfield enclosed by peaks that creates one of the most remote and visually extraordinary environments accessible to experienced trekkers anywhere in the world.

The Biafo-Hispar traverse, crossing the full 120-kilometre length of both glaciers through Snow Lake, is one of the great wilderness trekking routes on Earth. It requires a fully supported expedition with experienced guides, proper high-altitude equipment, and meticulous logistics. The glacier hosts remarkably diverse wildlife for its altitude, including ibex, markhor, Himalayan brown bear, and occasionally snow leopard along the moraine edges.

The Batura Glacier flows westward from the Batura Wall, a ridge holding six peaks above 7,000 metres, through the upper Hunza Valley in Gojal. At 57 kilometres it is the longest glacier in Pakistan outside of Baltistan and one of the most accessible major glaciers in the Karakoram, with its lower reaches visible from the Karakoram Highway. The snout of the glacier comes close enough to the road that travellers on the highway can see the grey, debris-covered ice terminating above the valley floor without any trekking required.

The lower reaches of Batura are characteristic of large Karakoram glaciers: a broad grey surface of rocky moraine covering the ice below, surrounded by lateral moraines and flanked by the villages and pastures of Passu and Gulmit. At its upper reaches, above the debris zone, the glacier opens into a pristine world of white ice, crevasses, and seracs beneath the extraordinary peaks of the Batura Muztagh.

The Passu and Ghulkin glaciers in Upper Hunza are among the most accessible glaciers in Pakistan and among the most dramatically beautiful. The Passu Glacier flows directly toward the village of Passu, its snout terminating close enough to the Karakoram Highway that the ice is visible from the road. Above the glacier, the extraordinary spires of the Passu Cones (Tupopdan) rise to over 6,100 metres in a series of needle-like formations that are among the most photographed peaks in Pakistan.

The Ghulkin Glacier, a few kilometres further along the highway, is even more striking in its accessibility. The glacier’s surface can be reached by a short walk from the village of Ghulkin, and the combination of the Batura Wall peaks, the ice surface, and the Karakoram Highway below creates a visual juxtaposition of human scale and geological enormity that is genuinely difficult to process. Both glaciers are part of the experience on Crossroads Adventure’s Patundas Ridge trekking expedition in Upper Hunza.

The Chiantar Glacier in Chitral, Khyber Pakhtunkhwa, is the largest glacier in Pakistan’s Hindu Kush range and one of the least visited of the country’s major glaciers. At 34 kilometres it is considerably smaller than the Karakoram giants, but it sits in a landscape of quite different and extraordinary character. The Hindu Kush valleys leading to Chiantar are green and culturally rich at lower elevations, passing through communities with deep Khowar and Nuristani cultural traditions before opening into the high, bare moraine landscapes of the upper glacier approaches.

The Hindu Kush glaciers, including Chiantar, feed rivers that flow through Chitral and into Afghanistan, contributing to water systems that serve communities on both sides of the border. Their relative inaccessibility compared to the Karakoram glaciers means they have been less studied, and the full scope of their contribution to regional water systems is still being documented by glaciologists.