Mongolia is not mostly desert. Grasslands, known as steppes, cover more than three-fourths of the country’s total territory. The Gobi Desert is enormous and dominates the southern landscape, but it represents about 41% of Mongolia’s land area, making it a major feature rather than the defining one. The rest of the country includes forests, mountains, river valleys, and lakes that look nothing like the barren expanses most people picture.
What the Gobi Actually Covers
The Gobi Desert stretches across southern and southeastern Mongolia and into northern China, spanning roughly 500,000 square miles in total. Within Mongolia’s borders, it accounts for about 41.3% of the national territory. That’s a massive chunk of land, which helps explain why so many people assume the whole country is desert.
But the Gobi itself isn’t the endless sand dunes of popular imagination. Much of it is classified as semidesert, meaning it gets slightly more rainfall than a true desert and supports sparse vegetation, especially scrubby grasses and low shrubs. Only portions of the Gobi are genuinely barren. The Mongolian word “gobi” translates to “waterless place,” which is more accurate than calling the whole region a sand sea.
Mongolia’s Six Vegetation Zones
Mongolia’s landscape shifts dramatically from north to south, cycling through distinct ecological zones. Starting at the Russian border and moving toward China, you pass through taiga (dense coniferous forest), forest-steppe (a mix of woodland and grassland), open steppe, desert steppe, and finally true desert in the far south. Alpine vegetation covers the highest mountain areas in the west.
The steppe is the dominant landscape. These are wide, rolling grasslands with few trees, swept by strong winds and grazed by livestock and wild animals. They extend across the central and eastern parts of the country and form the habitat most associated with Mongolia’s nomadic herding culture. The transition from steppe to desert steppe is gradual: grasses thin out, bare patches of soil appear more frequently, and rainfall drops below what can sustain continuous ground cover.
Forests cover a surprisingly small portion of the country. Closed forest, mainly Siberian larch and pine in the north, accounts for only about 8.1% of Mongolia’s total land area, or roughly 12.7 million hectares. These forests cluster in the northern mountains near the Russian border, particularly around the Khentii and Khangai ranges. They’re an extension of the Siberian taiga, the boreal forest belt that circles the northern hemisphere.
Rivers, Lakes, and Mountains
Northern Mongolia has a well-developed river system that drains toward the Arctic and Pacific oceans. The Orkhon River, the country’s longest at roughly 700 miles, flows entirely within Mongolia before joining the Selenge, which continues north into Russia and eventually feeds Lake Baikal. The Kherlen River runs south from the Khentii Mountains before turning east across the Mongolian plains and into China.
The western part of the country holds the Great Lakes region, tucked between the Mongolian Altai, the Khangai Mountains, and the Siberian border ranges. More than 300 lakes sit in this area. Lake Khövsgöl, near the northern border, is the country’s largest and deepest freshwater body, sometimes called the “younger sister of Baikal.” Other significant lakes include the saline Lake Uvs, covering about 1,290 square miles, and the freshwater Lake Khar Us. Many of Mongolia’s lakes, particularly those further south, are salty and fluctuate dramatically in size with the seasons.
The contrast between regions is stark. In the north, swift mountain torrents carve jagged gorges through forested slopes. In the south, seasonal streams run briefly after rare rains, then vanish into stone and sand. The western and southern two-thirds of the country form interior drainage basins where water never reaches the ocean.
Desertification Is Expanding
While Mongolia isn’t mostly desert today, the balance is shifting. Desertification, the process by which productive land degrades into arid, barren ground, is a serious and ongoing concern. A study examining the Mongolian Plateau from 2001 to 2020 found a clear vulnerability gradient running from south to north, with the southern regions most at risk.
The drivers differ by region. In Mongolia specifically, bare land expansion, declining soil moisture, and grazing pressure interact to push vulnerable steppe land toward desert conditions. Overgrazing is a particular problem: Mongolia’s livestock population has grown significantly in recent decades, and concentrated herds strip grasslands faster than they can recover.
The overall trend during 2001 to 2020 showed some improvement, with very low and low vulnerability areas expanding. But future projections paint a more complicated picture. Under high-emission climate scenarios, high-vulnerability areas could increase by 8.4% between 2040 and 2100. Under lower-emission scenarios, the trajectory follows a V-shaped pattern, worsening before improving. The steppe that defines Mongolia’s identity is not guaranteed to remain.
Why the Desert Misconception Persists
The Gobi is Mongolia’s most internationally famous geographic feature, and it looms large in travel photography and documentary coverage. When people think of Mongolia, they picture camels crossing sand flats or gers (yurts) pitched against a vast, empty horizon. Those images are real, but they represent the southern fringe of a much more varied country.
The steppe, which covers most of Mongolia, can look desolate to outsiders. It’s flat, treeless, and sparsely populated. From a distance or in photographs, steppe grasslands can easily be mistaken for desert. But the difference matters: steppe supports continuous grass cover, grazing animals, and nomadic communities. True desert does not. Mongolia’s landscape is defined by grass, not sand.