Western Ghats vs Eastern Ghats: Difference for UPSC

By Dooit UPSC expert · 5 November 2026 · 9 min read

The core difference between the Western Ghats and the Eastern Ghats is this: the Western Ghats are a continuous, higher, older wall of mountains along the west coast, while the Eastern Ghats are a broken, lower, eroded chain of hills along the east coast. The one fact that explains almost everything else — continuity, rivers, rainfall, biodiversity — is that the Eastern Ghats are cut through by the big east-flowing rivers, and the Western Ghats are not. Hold on to that single idea and the whole comparison unlocks.

In thirty years of teaching geography to civil-services aspirants, I have watched this exact topic decide a mark more times than I can count. It looks like innocent school GK — "name the two Ghats" — but UPSC almost never asks it that plainly. They ask which range is older, which is higher, where the two meet, which rivers rise where, and which hills belong to which chain. Candidates who learned the Ghats as two vague lines on a map lose those marks. Candidates who understand why the two ranges differ answer in seconds. This article teaches it the way I teach it in class — the logic first, then the facts, then the traps.

The one idea behind every difference

Before the table, understand the mechanism, because if you grasp this you will never need to cram the comparison. The Western Ghats are block mountains formed along the great faulted western edge of the Deccan Plateau. When the Indian landmass broke away and drifted, the western margin was uplifted sharply and the edge faced the sea as an almost unbroken escarpment. That is why the Western Ghats look like a steep wall from the Konkan coast and a gentle slope from the plateau side.

The Eastern Ghats never had that clean uplift. They are the worn-down, residual remnants of much older mountains, and — this is the part that matters — they sit in the path of India's largest east-flowing rivers. The Mahanadi, Godavari, Krishna and Kaveri all drain the Deccan eastward into the Bay of Bengal, and over millions of years they have sliced right through the Eastern Ghats. A range cut repeatedly by big rivers cannot stay continuous. So the Eastern Ghats survive only as detached blocks of hills between the river valleys. Continuity in the west, fragmentation in the east — and a single geological story explains both.

Western Ghats vs Eastern Ghats: the comparison table

Here is the full comparison the way it is actually tested. Study it until each row comes to you instantly — UPSC loves to swap one cell (say, give you the Eastern Ghats' height for the Western Ghats) and see if you notice.

Highest peaks — the figures UPSC tests

The elevation difference is not a small detail; it is often the whole question. The highest peak of the Western Ghats is Anamudi in Kerala, about 2,695 metres, which is also the highest point in peninsular India south of the Himalayas. The highest peak of the Eastern Ghats lies in the Araku region of Andhra Pradesh — usually given as Arma Konda (you will also see the name Jindhagada peak used for the same high ground), at roughly 1,680 metres. Note the gap: nearly a full kilometre separates the two. Another frequently tested Eastern Ghats peak is Mahendragiri in Odisha, around 1,501 metres.

Where do the Western and Eastern Ghats meet?

This is a near-permanent favourite. The two ranges converge in the south at the Nilgiri Hills, in the meeting zone of Tamil Nadu, Karnataka and Kerala. Picture the peninsula's two coastal walls leaning towards each other and knotting together at the Nilgiris — that knot is the answer examiners want. The Nilgiris are rich, high and famous (think Ooty, Doddabetta, the shola grasslands), and treating them as the junction point ties the whole southern peninsula together in your mind.

Rainfall: why the west is wet and the east is dry

The rainfall contrast is pure physics, and if you explain the physics in a Mains answer you stand out. The south-west monsoon sweeps in off the Arabian Sea from June and hits the Western Ghats head-on. Because the Ghats are a tall, continuous barrier, the moist air has nowhere to go but up; as it rises it cools, the moisture condenses, and it pours down on the windward (western) slopes — classic orographic rainfall. That is why the Konkan and Malabar coasts are drenched and places like Agumbe in Karnataka are among the wettest in India.

Cross to the leeward side and you drop into the rain-shadow — the reason the interior Deccan around Pune and the Marathwada–Rayalaseema belt is semi-arid despite sitting just behind a region of torrential rain. The Eastern Ghats, by contrast, are lower, broken and aligned more along the direction of the bay winds, so they cannot wring out the same volume of rain. They depend far more on the retreating (north-east) monsoon in October–November, which is why Tamil Nadu's main rains come late in the year. If you want to see how these two monsoon systems fit together, our explainer on the Indian monsoon for UPSC lays out the full mechanism.

Rivers and biodiversity — the two follow-up questions

The Western Ghats are the water tower of peninsular India. The Godavari rises near Nashik, the Krishna near Mahabaleshwar, and the Kaveri in the Brahmagiri hills of Karnataka — all three in the Western Ghats — and all three flow east across the entire plateau to the Bay of Bengal, cutting through the Eastern Ghats on the way. That is the mechanism behind the Eastern Ghats' broken shape, and it connects straight to the peninsular drainage pattern. If rivers are shaky for you, revise them alongside this topic with our guide to the drainage system of India.

On biodiversity, the Western Ghats are in a different league. They are one of India's biodiversity hotspots and were inscribed as a UNESCO World Heritage Site in 2012 for their exceptional endemism — the lion-tailed macaque, the Nilgiri tahr and a long list of amphibians found nowhere else. They are also the subject of the long-running policy debate over ecologically sensitive areas: the Gadgil panel (2011) recommended treating almost the entire range as ecologically sensitive, while the later Kasturirangan group (2013) scaled this down to roughly 37 percent — a tussle between conservation and livelihoods that keeps returning to the news and to your Mains paper. The Eastern Ghats are ecologically valuable too, but far more fragmented and degraded. For the conservation framing, pair this with our note on biodiversity hotspots in India.

How UPSC frames this — Prelims and Mains

In Prelims, expect crisp factual and statement questions: which range is higher, which is older, where the two meet, the correct highest peak, or a match-the-following linking hills (Nallamala, Javadi, Shevaroy, Nilgiri) to the right Ghat. The hill groups of the Eastern Ghats — Nallamala, Velikonda, Palkonda, Javadi, Shevaroy — are worth a quick list, because a stray option naming one of them is a common trap. In Mains GS Paper I, the demand turns analytical: the Western Ghats' role in the monsoon and peninsular drainage, or the development-versus-ecology debate over the Ghats' sensitive zones. Prepare both layers from one set of notes so you are not relearning the topic twice.

Fit this into the larger physiography of the subcontinent rather than as an isolated flashcard — the Ghats only make sense against the Deccan Plateau and the coastal plains around them. If that bigger map is hazy, read our walkthrough of the physiographic divisions of India first, and for the overall subject plan see our UPSC geography preparation strategy. Study the Ghats as a connected system — mountains, rivers, rainfall, biodiversity — and the questions stop being a memory test and start being obvious.

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