Central Karakoram

Central Karakoram National Park (CKNP) in Gilgit-Baltistan, northern Pakistan, is the largest national park in Pakistan and one of the largest in Asia, covering approximately 13,532 square kilometres. Established in 1993, it encompasses the central portion of the Karakoram range—the world's greatest concentration of high mountains after the Himalayas. Four of the world's fourteen 8,000-metre peaks lie within or adjacent to the park: K2 (8,611 m, the world's second highest), Gasherbrum I, Gasherbrum II, and Broad Peak. The park protects extraordinary alpine landscapes, glaciers including the Baltoro—one of the world's largest non-polar glaciers—and critical wildlife habitat in the high Karakoram valleys.

CKNP provides vital habitat for snow leopards, which occur throughout the high rocky terrain above 3,500 m. Brown bears inhabit the valley forests and high pastures, and are relatively common in the Braldu and Shigar valleys. Marco Polo sheep (Ovis ammon polii), with their spectacular curved horns, are present at the highest elevations near the Afghan and Chinese borders. Ibex (Capra ibex sibirica) are the most abundant large ungulate, with substantial herds on the rocky slopes and cliffs. The Markhor (Capra falconeri), Pakistan's national animal, occurs in lower valley sections. Common and golden eagles soar above the glaciers. The cold rivers support snow trout (Schizothorax), an important food source for local communities.

Vegetation in CKNP reflects the extreme altitude and arid continental climate. The valleys below 3,000 m support scattered groves of juniper (Juniperus excelsa), willow, sea buckthorn, and poplar, often adjacent to the irrigated cultivation terraces of Balti villages. Alpine meadows (locally called 'margs') rich in sedges, saxifrages, and primulas appear between 3,500 and 4,500 m during the brief summer growing season and provide critical grazing for both wildlife and livestock. Above 5,000 m, only the most extreme cushion plants and cryophytic lichens survive. The extreme aridity of many valleys—lying in rain shadows of the main ranges—creates semi-desert conditions with sparse annual plants in seasonal stream beds.

The Karakoram is a tectonically complex range formed at the collision zone of the Indian and Eurasian plates. Unlike the Himalayas, which are primarily sedimentary rocks, the Karakoram is largely composed of igneous and metamorphic rocks including enormous granite batholiths—the Karakoram Batholith—intruded during and after the tectonic collision. The rock scenery is consequently characterised by dramatic granite towers and walls. The Baltoro Glacier (62 km long) and associated glaciers in the Concordia area represent the world's greatest concentration of glacier ice outside the polar regions. The geological activity continues today; earthquakes are common, and the mountains are still rising. Landslides and glacial lake outburst floods (GLOFs) are regular natural hazards.

CKNP experiences one of the world's most extreme mountain climates. The valleys are arid because the Karakoram lies in the rain shadow of the Himalayas relative to the monsoon; most precipitation comes from westerly winter storms rather than the summer monsoon. Valley floors may receive less than 200 mm annually. The high peaks accumulate heavy snowfall and feed the enormous glaciers. Summer temperatures in valley villages reach 25–35°C, while the glacier surface at 5,000 m remains below freezing. Winds on the upper mountain are ferocious. The climbing season is June to early August; the trekking season from the valleys is May to October, though mountain weather can change rapidly and violently.

The Baltistan region has been inhabited for over 5,000 years by Balti people, a Tibetan-speaking Buddhist community that converted to Shia Islam in the 15th century. The ancient Silk Road trade routes connecting Central Asia, China, and South Asia passed through the Karakoram valleys, and Skardu (the regional capital) was a major caravan stop. The Mir (ruler) of Hunza and the Raja of Baltistan controlled these valleys under complex tributary relationships with larger empires. British surveyors penetrated the region in the 19th century; the Great Trigonometric Survey measured and named the peaks beginning in the 1850s. Mountaineering expeditions began in the 1890s, and the first ascent of K2 was made by an Italian team in 1954.

CKNP was established in 1993, combining several earlier reserved forest and game reserve designations into a unified national park. The park boundaries were designed to encompass the core glacial and high alpine terrain while excluding the main inhabited valleys below 2,800 m, which remain under traditional community land use. The Snow Leopard Conservancy-Pakistan, WWF-Pakistan, and other organisations have worked with park authorities on community-based conservation programmes since the 1990s. A management plan developed with IUCN support has guided activities including wildlife monitoring, ranger training, and controlled mountaineering access. Certification of K2 base camp treks and management of expedition waste have been important management challenges.

The Baltoro Glacier trek to K2 Base Camp (Concordia) is one of the world's great mountain treks, taking approximately 12 days return from the roadhead at Askole. The trek passes through Urdukas, Goro II, and Concordia—the confluence of the Baltoro, Godwin-Austen, and Vigne glaciers—with overwhelming views of K2, the Gasherbrums, Broad Peak, and the Cathedral peaks. The Gondogoro La crossing connects to the Hushe Valley in a magnificent high route. The Hushe Valley itself offers excellent trekking with views of Masherbrum (7,821 m). Shimshal is accessible via a jeep road and offers alpine treks with wildlife viewing. The Biafo-Hispar glacier crossing (the Snow Lake route) is a major multi-week expedition.

Skardu has an airport with domestic flights from Islamabad (daily in summer, weather permitting). An alternative is the Karakoram Highway from Islamabad to Gilgit (16–18 hours by road) then onward to Skardu (6 hours). Trekking permits for specific routes (including the K2 Basecamp trek) must be obtained from the Ministry of Tourism in Islamabad; separate mountaineering permits are required for peak climbing. Porters and guides are hired in Skardu and local villages. The trek requires camping as there are no lodges beyond Askole. Basic hotels and guesthouses in Skardu and Khaplu provide pre- and post-trek accommodation. The trekking season is June to September.

CKNP faces severe pressure from climate change: the Karakoram glaciers are among the world's most sensitive to warming, and while some glaciers have been surging (advancing anomalously), overall ice mass is declining. Glacial Lake Outburst Floods (GLOFs) are increasing in frequency and severity, threatening downstream communities and park infrastructure. Waste management on high-traffic trekking routes, particularly the Baltoro, remains challenging; expedition waste accumulation at base camps requires active clean-up. Community-based snow leopard conservation programmes have reduced retaliatory killing in exchange for livestock insurance schemes. Overgrazing by domestic livestock in high-altitude meadows competes with wildlife. A community ranger network has improved anti-poaching patrols.