Zanskar Range in the context of Geology of the Himalaya

The Zanskar River is the first major tributary of the Indus River, equal or greater in volume than the main river, which flows entirely within Ladakh, India. It originates northeast of the Great Himalayan range and drains both the Himalayas and the Zanskar Range within the region of Zanskar. It flows northeast to join the Indus River near Nimo.

The Western Himalayas are the western half of the Himalayas, in northwestern India and northern Pakistan. Four of the five tributaries of the Indus River in Punjab (Beas, Chenab, Jhelum, and Ravi) rise in the Western Himalayas; while the fifth, the Sutlej cuts through the range after rising in Tibet.

Included within the Western Himalayas are the Zanskar Range, the Pir Panjal Range, and the Dhauladhar Range, and western parts of the Sivalik Range and the Great Himalayas. The highest point is Nanga Parbat (26,660 feet or 8,126 metres), at the northwestern end of the region. It is part of the Himalayan biodiversity hotspot.

The climate of India includes a wide range of weather conditions, influenced by its vast geographic scale and varied topography. Based on the Köppen system, India encompasses a diverse array of climatic subtypes. These range from arid and semi-arid regions in the west to highland, sub-arctic, tundra, and ice cap climates in the northern Himalayan regions, varying with elevation.

The Indo-Gangetic Plains in the north experience a humid subtropical climate which become more temperate at higher altitudes, like the Sivalik Hills, or continental in some areas like Gulmarg. In contrast, much of the south and the east exhibit tropical climate conditions, which support lush rainforests in parts of these territories. Many regions have starkly different microclimates, making it one of the most climatically diverse countries in the world. The country's meteorological department follows four seasons with some local adjustments: winter (December to February), summer (March to May), monsoon or south-west monsoon (June to September) and post-monsoon or north-east monsoon (October to November). Some parts of the country with subtropical, temperate or continental climates also experience spring and autumn.

Reo Purgyil (6,816 m), and it's shorter twin known as Leo Pargial or Leo Pargil (6,791 m), are twin mountain peak at the southern end of the Zanskar Range in the Western Himalaya located on the border between Himachal Pradesh, India and Tibet, China.

Reo Purgyil, is the highest mountain peak in the state of Himachal Pradesh. This dome shaped peak, often obscured by clouds, is part of a great massif that rises above the Sutlej river and overlooks the western valleys of Tibet. The Spiti River, a right bank tributary of the Satluj, drains the northern face of the massif.