Hoh Xil: The High-Altitude Volcanic Wilderness at the Roof of the World

Countries & Cities · Published 29 September 2026 Swipe more like this →

In short: Spanning 83,000 square kilometres across the Qinghai-Tibet Plateau, Hoh Xil is a remote, volcanic landscape of extreme elevations. Known as the Lord of Ten Thousand Mountains, this UNESCO World Heritage site serves as a vital sanctuary for rare wildlife and acts as a primary headwater for the mighty Yangtze River.

Situated between the Tanggula and Kunlun mountain ranges, Hoh Xil represents the highest and most expansive plateau on Earth. Its geography is defined by a harsh climate and an average elevation of 4,800 metres. While the southeastern portion feeds the Yangtze River, the majority of the region remains endorheic, forming a unique lake district where water drains into isolated basins rather than reaching the ocean. In 1995, a 45,000 square kilometre section of this territory was formally protected as a national nature reserve.

The region is geologically active, characterized by a late-Cenozoic volcanic field. Researchers have identified several Hawaiian-style volcanoes, including Bamaoqiongzong, which features well-preserved structures and lava flows resting atop ancient lake deposits. Other volcanic sites, such as Yongbohu and Qiangbaqian, showcase diverse rock compositions like dacitic and trachyandesitic vents. Although a 1973 satellite image once sparked speculation regarding an eruption in the Kekexili caldera, modern analysis confirms the area has not seen historical volcanic activity.

Despite the unforgiving environment, Hoh Xil supports a rich ecosystem of over 230 wild animal species. It is a critical habitat for twenty protected animals, including the wild yak, white-lip deer, and the endangered Tibetan antelope, or chiru, which famously congregates at Zhuonai Lake. The plateau pika serves as a foundational food source for predators like brown bears. The region gained significant public attention in 2004 following the release of the film Kekexili: Mountain Patrol, which highlighted both the landscape and the conservation struggles of the chiru.

Human infrastructure has also adapted to this extreme terrain. The eastern boundary is marked by the Qingzang Railway and China National Highway 109. Notably, the Fenghuoshan Tunnel—the highest railway tunnel in the world—was built here, with entrances reaching 4,905 metres above sea level. This blend of geological wonder and strategic engineering makes Hoh Xil a site of immense scientific and cultural importance.

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