Nanda Devi peak forms a part of

1. Latitudinal Divisions of the Himalayas (basic)

Welcome to your first step in mastering the geography of the Indian mountains! To understand the Himalayas, we must first look at how they are arranged from North to South. Rather than being a single mountain wall, the Himalayas consist of four distinct, parallel longitudinal ranges that vary in height, age, and geology. These ranges stretch about 2,500 km from west to east, with their width decreasing from nearly 500 km in Kashmir to about 320 km in the east Geography of India, Physiography, p.1.

Starting from the northernmost edge and moving toward the Indian plains, the four divisions are:

• The Trans-Himalayas: Located immediately north of the Greater Himalayan range, these include the Karakoram, Ladakh, and Zaskar ranges. This region is home to massive glaciers and high-altitude plateaus Geography of India, Physiography, p.23.
• The Greater Himalayas (Himadri): This is the most continuous and highest range. It contains the world’s most iconic peaks, such as Mount Everest and Kanchenjunga. Because of its extreme altitude, it remains perpetually snow-covered Exploring Society: India and Beyond, Geographical Diversity of India, p.6.
• The Lesser Himalayas (Himachal): Situated south of the Himadri, this range is known for its rugged terrain and beautiful valleys like Kashmir, Kangra, and Kullu. Most of India’s famous hill stations, such as Shimla, Mussoorie, and Nainital, are found here CONTEMPORARY INDIA-I, Physical Features of India, p.8.
• The Shiwaliks (Outer Himalayas): This is the southernmost and youngest range of the system. They are lower in altitude and consist of unconsolidated sediments brought down by rivers from the higher ranges Exploring Society: India and Beyond, Geographical Diversity of India, p.6.

Range (North to South)	Alternative Name	Key Characteristic
Trans-Himalaya	Tethys Himalaya	Home to Karakoram & Ladakh ranges
Greater Himalaya	Himadri	Highest peaks, permanent snow
Lesser Himalaya	Himachal	Famous hill stations & valleys
Outer Himalaya	Shiwaliks	Lowest altitude, youngest range

Sources: Geography of India, Physiography, p.1; Geography of India, Physiography, p.10; Geography of India, Physiography, p.23; Exploring Society: India and Beyond, Geographical Diversity of India, p.6; CONTEMPORARY INDIA-I, Physical Features of India, p.8

2. Longitudinal/Regional Classification of Himalayas (intermediate)

While the standard classification of the Himalayas follows a North-to-South latitudinal arrangement (Greater, Lesser, and Shiwalik), geographers like Sir Sidney Burrard proposed a unique Longitudinal (or Regional) Classification. Instead of looking at height, this method divides the massive 2,500 km mountain arc from West to East based on the natural boundaries formed by major river valleys Majid Husain, Geography of India, Physiography, p.13. This perspective is vital because it links the physical mountain ranges with the drainage systems of India.

This regional approach identifies four primary segments, each characterized by distinct topography and river systems:

Regional Division	River Boundaries	Key Characteristics
Punjab Himalayas	Indus to Satluj	Also known as Kashmir/Himachal Himalayas; it is the widest part of the range.
Kumaon Himalayas	Satluj to Kali	Located primarily in Uttarakhand; home to peaks like Nanda Devi and Trisul NCERT, Contemporary India-I, Physical Features of India, p.10.
Nepal Himalayas	Kali to Teesta	The longest and highest section, containing Mt. Everest and Kanchenjunga.
Assam Himalayas	Teesta to Dihang	The easternmost stretch, ending where the Brahmaputra (Dihang) cuts through.

Understanding these divisions helps in identifying the specific ecological and floristic characteristics of different zones. For instance, the Western Himalayas (encompassing Punjab and Kumaon) feature alpine pastures known as Margs in Kashmir, whereas the Eastern regions are significantly more humid and lush Majid Hussain, Environment and Ecology, Biodiversity, p.25.

Sources: Geography of India (Majid Husain), Physiography, p.13; Contemporary India-I (NCERT), Physical Features of India, p.10; Environment and Ecology (Majid Hussain), Biodiversity, p.25

3. The Trans-Himalayan Ranges (intermediate)

When we look at the crown of India, we encounter the Trans-Himalayan Ranges. Unlike the Great Himalayas which formed later, these ranges are geologically older and are often referred to as the Tibetan Himalayas because a large part of them lies in Tibet. They consist primarily of three major parallel ranges: the Karakoram, the Ladakh, and the Zaskar. These mountains act as a massive rain shadow, preventing the Indian monsoon from reaching the north, which explains why the regions behind them (like Ladakh) are cold deserts. Geography of India, Physiography, p.23

The Karakoram Range is the northernmost and most formidable. It is home to K2 (Mount Godwin-Austen), the second-highest peak in the world, and some of the largest glaciers outside the polar regions, such as the Siachen Glacier (located in the Nubra Valley) and the Biafo Glacier. Geography of India, Physiography, p.24. South of the Karakoram lies the Ladakh Range, and further south is the Zaskar (or Zanskar) Range. A key geographical feature to remember is that the Indus River flows in a deep gorge between the Ladakh and Zaskar ranges, carving its way through this rugged terrain. Geography of India, Physiography, p.101

Range	Key Highlight	Notable Feature
Karakoram	"Backbone of High Asia"	Home to K2 and Siachen Glacier
Ladakh	Cold Desert region	Contains the Leh district
Zaskar	Boundary Range	Home to the Drang Drung glacier

Sources: Geography of India, Physiography, p.23; Geography of India, Physiography, p.24; Geography of India, Contemporary Issues, p.101

4. Drainage Systems and River Boundaries (intermediate)

In the study of Indian geography, rivers are not just water bodies; they are the geological architects that define the structure of the Himalayas. One of the most fascinating concepts here is Antecedent Drainage. These are rivers that existed before the Himalayan mountains were uplifted. As the land rose, these rivers were powerful enough to maintain their original courses by cutting deep, V-shaped valleys known as gorges. Prominent examples include the Indus, Satluj, and Brahmaputra, which pierce through the Greater Himalayas to reach the plains Geography of India, The Drainage System of India, p.1.

Geographers use these antecedent rivers as natural markers to divide the massive 2,400 km Himalayan arc into distinct longitudinal regions. This system provides a clear framework for understanding which mountain peaks and states belong to which segment. For instance, the Kali River (also known as the Sarda or Sarju) serves as a vital boundary. It originates from the Milam glacier and forms a natural border between India and Nepal INDIA PHYSICAL ENVIRONMENT, Drainage System, p.22.

The table below summarizes these regional divisions based on their river boundaries:

Regional Division	Western Boundary	Eastern Boundary
Punjab Himalayas	Indus River	Satluj River
Kumaon Himalayas	Satluj River	Kali (Sarda) River
Nepal Himalayas	Kali (Sarda) River	Teesta River
Assam Himalayas	Teesta River	Dihang (Brahmaputra) River

Understanding these boundaries is crucial for identifying the location of major peaks. For example, the Kumaon Himalayas, nestled between the Satluj and the Kali, cover parts of Uttarakhand and Himachal Pradesh and are home to some of India’s highest and most sacred summits Geography of India, India–Political Aspects, p.33.

Sources: Geography of India, The Drainage System of India, p.1; INDIA PHYSICAL ENVIRONMENT, Drainage System, p.22; Geography of India, India–Political Aspects, p.33

5. Strategic Himalayan Passes (exam-level)

Himalayan passes, or 'La' in the local dialect, are more than just geographical gaps; they are the strategic 'gateways' that have shaped India's history, trade, and national security. In the high-altitude terrain of the Greater Himalayas, these passes are often the only viable routes for movement. For instance, in the Ladakh region, Khardung La serves as a vital artery connecting Leh to the strategically sensitive Siachen Glacier, while the Qara Tagh Pass historically served as a key offshoot of the Great Silk Road Geography of India, Physiography, p.21. These passes are often seasonal, with many like the Burzail Pass remaining closed during harsh winters due to heavy snow Geography of India, Physiography, p.20. Moving eastward, the passes transition from purely strategic military outposts to essential trade and pilgrimage conduits. In Himachal Pradesh, the Shipki La is particularly significant because it is the point where the River Satluj enters India from Tibet; it also serves as one of India's three primary border trade posts with China Geography of India, Physiography, p.22. Similarly, Uttarakhand hosts a cluster of high-altitude passes such as Mana, Niti, and Lipu Lekh. The latter is famous for facilitating the Kailash-Mansarovar Yatra, acting as a tri-junction between India, Nepal, and Tibet Geography of India, Physiography, p.20. In the Eastern Himalayas, the topography dictates a different strategic focus. Nathu La in Sikkim, reopened in 2006 after the 1962 conflict, remains a cornerstone of Indo-China border trade Geography of India, Physiography, p.21. Further east in Arunachal Pradesh, passes like Diphu and Pangsau are critical for connectivity with Myanmar. Unlike the high-altitude passes of the west, some eastern passes like Diphu remain open throughout the year, providing a permanent link to the Mandalay region Geography of India, Physiography, p.20.

Region	Key Pass	Strategic Significance
Ladakh	Khardung La	Gateway to Nubra Valley and Siachen Glacier.
Himachal Pradesh	Shipki La	Entry point of River Satluj; Trade post.
Uttarakhand	Lipu Lekh	Primary route for Mansarovar Pilgrims.
Sikkim	Nathu La	Offshoot of the ancient Silk Road; Trade hub.

Sources: Geography of India, Physiography, p.20; Geography of India, Physiography, p.21; Geography of India, Physiography, p.22

6. Kumaon and Garhwal Himalayas: A Deep Dive (exam-level)

When we study the Himalayas, we usually think of them from North to South (Greater, Lesser, Shiwaliks). However, for a complete UPSC preparation, you must also master the regional longitudinal divisions which are defined by river valleys. The segment of the Himalayas stretching for about 320 km between the Satluj River in the west and the Kali River in the east is known as the Kumaon Himalayas Contemporary India-I, Physical Features of India, p.10. This region is further subdivided into the Garhwal Himalayas (the western part) and the Kumaon Himalayas proper (the eastern part).

This region is the spiritual and hydrological heart of India. It is home to the Nanda Devi peak, which holds a unique distinction: it is the second-highest peak in India and the highest peak located entirely within Indian territory. Other prominent peaks that define this skyline include Kamet, Trishul, Badrinath, and Kedarnath. The terrain transitions from these towering icy giants to the world-famous hill stations of the Lesser Himalayas, such as Mussoorie, Nainital, and Ranikhet Contemporary India-I, Physical Features of India, p.8.

To understand the geography of this zone, you must look at its glaciers and river systems. The Kumaon-Garhwal region is the source of India's most sacred rivers. The Gangotri Glacier gives rise to the Bhagirathi (Ganga), while the Yamunotri Glacier feeds the Yamuna. Other significant glaciers include the Milam Glacier (the largest in the Kumaon region and source of the Gori Ganga) and the Pindari Glacier Geography of India (Majid Husain), Physiography, p.25. Culturally, this region is defined by the Char Dham Yatra—comprising Gangotri, Yamunotri, Kedarnath, and Badrinath—which draws millions of pilgrims and requires careful environmental regulation due to the fragile mountain ecology Geography of India (Majid Husain), Contemporary Issues, p.33.

Regional Division	Western Boundary	Eastern Boundary
Punjab Himalayas	Indus River	Satluj River
Kumaon Himalayas	Satluj River	Kali River
Nepal Himalayas	Kali River	Teesta River
Assam Himalayas	Teesta River	Dihang (Brahmaputra)

Sources: Contemporary India-I, Physical Features of India, p.10; Contemporary India-I, Physical Features of India, p.8; Geography of India (Majid Husain), Physiography, p.15; Geography of India (Majid Husain), Physiography, p.25; Geography of India (Majid Husain), Contemporary Issues, p.33

7. Prominent Peaks and Protected Areas (exam-level)

In our study of Indian mountains, it is vital to understand that a peak is more than just a topographic high point; it is often the biological 'anchor' for a region. Take Nanda Devi (7,817m) as a prime example. While Kanchenjunga is the highest peak in India (8,598m), Nanda Devi holds the distinction of being the highest peak situated entirely within Indian territory CONTEMPORARY INDIA-I, Geography, Class IX . NCERT(Revised ed 2025), Chapter 2: Physical Features of India, p.8. Geographically, it is the crown of the Kumaon Himalayas— the regional division of the Himalayas lying between the Satluj and Kali rivers.

Beyond its height, Nanda Devi represents the pinnacle of environmental protection. It is one of India's 18 Biosphere Reserves and is part of the UNESCO World Network of Biosphere Reserves Geography of India, Majid Husain (9th ed.), Natural Vegetation and National Parks, p.51. Unlike standard National Parks that might focus on specific species, Biosphere Reserves are designed to conserve the entire ecosystem's natural and cultural diversity Environment and Ecology, Majid Hussain (3rd ed.), BIODIVERSITY, p.32. This holistic approach ensures that the mountain landscape, from the valley floor to the glaciated peak, remains pristine.

Moving to Peninsular India, the relationship between elevation and biodiversity continues. The Western Ghats increase in height as you move from north to south, culminating in Anai Mudi (2,695m), the highest peak of Peninsular India. This stands in sharp contrast to the Eastern Ghats, which are lower and more eroded, with Mahendragiri (1,501m) as a notable peak CONTEMPORARY INDIA-I, Geography, Class IX . NCERT(Revised ed 2025), Chapter 2: Physical Features of India, p.12.

Peak	Region	Height (m)	Key Fact
Kanchenjunga	Himalayas (Sikkim)	8,598	Highest in India; shared with Nepal
Nanda Devi	Kumaon Himalayas	7,817	Highest entirely in India; UNESCO Biosphere Reserve
Anai Mudi	Western Ghats	2,695	Highest in Peninsular India
Mahendragiri	Eastern Ghats	1,501	Highest in Eastern Ghats

Sources: CONTEMPORARY INDIA-I ,Geography, Class IX . NCERT(Revised ed 2025), Chapter 2: Physical Features of India, p.8, 10, 12; Geography of India ,Majid Husain, (McGrawHill 9th ed.), Natural Vegetation and National Parks, p.49, 51; Environment and Ecology, Majid Hussain (Access publishing 3rd ed.), BIODIVERSITY, p.32

8. Solving the Original PYQ (exam-level)

Now that you have mastered the longitudinal divisions of the Himalayas based on river valleys, this question serves as the perfect application of those building blocks. To solve this, you must connect two distinct pieces of knowledge: the political location of the peak and the river-based boundaries of the regional Himalayas. Since you know Nanda Devi is the highest peak located entirely within the state of Uttarakhand, your task is simply to identify which regional division encompasses that state.

Walking through the reasoning, we apply the classification defined in NCERT Class IX: Contemporary India-I. The Himalayas are divided into the Punjab (between Indus and Satluj), Kumaon (between Satluj and Kali), Nepal (between Kali and Teesta), and Assam (between Teesta and Dihang) segments. Because Uttarakhand lies between the Satluj and Kali rivers, Nanda Devi must form a part of the Kumaon Himalayas. This logical progression from river boundary to regional name is exactly how UPSC expects you to synthesize geographical data.

The other options represent common traps where students often mix up the river markers. The Punjab Himalayas are located too far west (primarily in Jammu & Kashmir and Himachal Pradesh), while the Nepal Himalayas cover the central stretch from the Kali river eastward. The Assam Himalayas are situated in the far east, near the Dihang (Brahmaputra) gorge. By visualizing the west-to-east sequence of the Indus-Satluj-Kali-Teesta-Dihang rivers, you can easily eliminate these distractors and confirm that the Kumaon Himalayas is the only correct fit for a peak in Uttarakhand.