🏔️ Overview
Argentina contains some of the highest, wildest, and most varied mountain landscapes in the world. The Andes Mountains form the country’s western backbone, extending from the dry volcanic plateaus of the northwest to the granite towers, glaciers, forests, and ice fields of Patagonia.
The country’s best-known summit is Aconcagua, the highest mountain in the Americas and the tallest peak anywhere outside Asia. Farther north, the Argentina–Chile border crosses enormous volcanoes such as Ojos del Salado, Llullaillaco, and Incahuasi. Southern Argentina offers a completely different mountain environment, where Fitz Roy, Cerro Torre, and the Southern Patagonian Ice Field rise above lakes, forests, and windswept steppe.
Although the Andes dominate Argentina’s geography, they are not the country’s only mountains. The Sierras Pampeanas form a collection of isolated interior ranges across central and northwestern Argentina, while lower ranges and volcanic plateaus extend into Patagonia.
From major high-altitude expeditions to accessible day hikes near Bariloche and El Chaltén, Argentina offers mountain adventures for nearly every level of experience.
⚡ Fast Facts
| Feature | Details |
|---|---|
| Continent | South America |
| Country | Argentina |
| Highest Mountain | Aconcagua |
| Official Elevation of Aconcagua | 6,960.8 m (22,837 ft), commonly rounded to 6,961 m |
| Primary Mountain System | Andes Mountains |
| Major Mountain Regions | Puna de Atacama, Central Andes, Cuyo, Sierras Pampeanas, Patagonian Andes |
| Highest Volcano | Ojos del Salado, shared with Chile |
| Famous Climbing Areas | Aconcagua, El Chaltén, Bariloche, Lanín, Catamarca high volcanoes |
| Notable Protected Areas | Aconcagua Provincial Park, Los Glaciares, Nahuel Huapi, Lanín, Los Alerces |
| Main Hiking Season | November through March in most high-mountain regions |
🏔️ Field Guide Tip: Argentina’s mountain regions differ dramatically. A summer trip to the high desert around Ojos del Salado requires different preparation from a trek through the rainy, wind-prone mountains of Patagonia.
📍 Where Are the Mountains in Argentina?
Most of Argentina’s major mountains lie near the country’s western border with Chile. The Andes continue through nearly the entire length of the country, but their appearance changes considerably from north to south.
In northwestern Argentina, the mountains rise above the Puna, an elevated landscape of volcanoes, salt flats, lagoons, and desert basins. This region includes parts of Jujuy, Salta, Catamarca, and La Rioja provinces.
The Central Andes cross San Juan and Mendoza, where Aconcagua, Mercedario, and Tupungato dominate an arid landscape of broad valleys and steep, rocky ridges. These mountains form the heart of Argentina’s high-altitude mountaineering region.
Farther south, the Andes of Patagonia pass through Neuquén, Río Negro, Chubut, Santa Cruz, and Tierra del Fuego. Although generally lower than the Central Andes, the Patagonian mountains are wetter, more heavily glaciated, and often more technically difficult.
East of the main Andes, the Sierras Pampeanas rise in a series of separate fault-block ranges. These mountains include the Sierras de Córdoba, Sierra de San Luis, Sierra de Famatina, Sierra de Velasco, and several ranges in Catamarca and Tucumán.
🗺️ Major Mountain Regions of Argentina
The Puna and Northwestern Andes
The Puna de Atacama is a vast high-altitude plateau shared by Argentina and Chile. Much of the Argentine Puna lies between approximately 3,500 and 4,500 meters above sea level, with volcanoes rising thousands of meters higher.
This is one of Argentina’s most extreme environments. Rainfall is scarce, vegetation is sparse, nights can be bitterly cold, and the intense sunlight is amplified by the elevation. Salt flats, volcanic cones, geothermal areas, and brilliantly colored lagoons create a landscape that is often compared to Mars.
Important mountains include:
- Ojos del Salado
- Monte Pissis
- Cerro Bonete
- Llullaillaco
- Tres Cruces
- Cerro Cazadero
- Incahuasi
- Nevado de Cachi
Many of these peaks require lengthy approaches by four-wheel-drive vehicle, careful acclimatization, and fully self-sufficient expedition planning.
The Central Andes and Cuyo
Argentina’s Central Andes contain Aconcagua and many of the country’s most prominent non-volcanic peaks. The region includes the Principal Cordillera, Frontal Cordillera, Precordillera, and Cordillera de la Ramada.
Cuyo—principally Mendoza, San Juan, and San Luis—is known for dry valleys, high passes, vineyards, and enormous mountains. Snow and glaciers in the Andes supply vital meltwater to the otherwise arid lowlands.
Notable summits include:
- Aconcagua
- Cerro Mercedario
- Tupungato
- Cerro del Plata
- Cerro Vallecitos
- Marmolejo
- Cerro Tolosa
Aconcagua Provincial Park is the region’s most famous protected mountain landscape, but Mendoza and San Juan also contain numerous quieter trekking and climbing destinations.
The Patagonian Andes
The Patagonian Andes are lower than Argentina’s northern and central peaks, yet they contain some of the continent’s most dramatic scenery. Granite towers rise above glaciers, turquoise lakes, lenga forests, and broad areas of Patagonian steppe.
The northern Patagonian Andes around Bariloche, San Martín de los Andes, and Esquel are greener and more accessible. Farther south, the mountains become increasingly rugged, glaciated, and remote.
Major mountains include:
- Fitz Roy
- Cerro Torre
- Cerro San Lorenzo
- Cerro Murallón
- Cerro Tronador
- Volcán Lanín
- Cerro Catedral
The Fitz Roy Range is especially famous for vertical granite walls and rapidly changing weather. While Fitz Roy is far lower than Aconcagua, its technical routes are considerably more difficult.
The Sierras Pampeanas
The Sierras Pampeanas are a group of isolated ranges extending across parts of Córdoba, San Luis, La Rioja, Catamarca, San Juan, and Tucumán.
Unlike the continuous western wall of the Andes, these mountains are separated by broad plains and dry valleys. Many consist of ancient crystalline rocks uplifted along faults during the formation of the Andes.
The best-known ranges include:
- Sierras de Córdoba
- Sierra de San Luis
- Sierra de Famatina
- Sierra de Velasco
- Sierra de Ambato
- Sierra de Aconquija
The Sierras de Córdoba are especially popular for hiking, paragliding, rock climbing, and weekend trips. Cerro Champaquí, the highest point in Córdoba Province, is one of central Argentina’s best-known trekking summits.
📏 The Ten Highest Mountains in Argentina
The table below follows current Peakbagger elevations for consistency. It includes summits shared with Chile and excludes secondary tops belonging to the same massif.
| Rank | Mountain | Elevation | Mountain Range | Location |
|---|---|---|---|---|
| 1 | Aconcagua | 6,962 m (22,841 ft)* | Principal Cordillera, Andes | Mendoza |
| 2 | Ojos del Salado | 6,893 m (22,615 ft) | Puna de Atacama, Andes | Catamarca / Chile border |
| 3 | Monte Pissis | 6,793 m (22,287 ft) | Puna de Atacama, Andes | Catamarca / La Rioja |
| 4 | Cerro Bonete | 6,760 m (22,178 ft) | Puna de Atacama, Andes | La Rioja |
| 5 | Llullaillaco | 6,752 m (22,152 ft) | Puna de Atacama, Andes | Salta / Chile border |
| 6 | Tres Cruces | 6,748 m (22,139 ft) | Puna de Atacama, Andes | Catamarca / Chile border |
| 7 | Cerro Mercedario | 6,717 m (22,037 ft) | Cordillera de la Ramada, Andes | San Juan |
| 8 | Cerro Cazadero | 6,663 m (21,860 ft) | Puna de Atacama, Andes | Catamarca |
| 9 | Incahuasi | 6,621 m (21,722 ft) | Puna de Atacama, Andes | Catamarca / Chile border |
| 10 | Tupungato | 6,573 m (21,565 ft) | Principal Cordillera, Andes | Mendoza / Chile border |
*Argentina’s Instituto Geográfico Nacional measured Aconcagua at 6,960.8 meters, while many international climbing databases continue to use 6,962 meters. The difference reflects measurement systems and rounding rather than a meaningful disagreement over its status as the highest mountain in the Americas.
Cerro Bonete is also widely called Bonete Chico. Cerro Cazadero appears under several alternative names, including Nevado Walter Penck, Walther Penck, and Tipas. Published elevations for several high Andean volcanoes vary by a few meters between topographic and volcanological sources.
🌟 Famous Mountains of Argentina
Aconcagua
Aconcagua is Argentina’s national mountain icon. It is the highest summit in South America, the Western Hemisphere, and the Southern Hemisphere, as well as the highest mountain outside Asia.
Its Normal Route does not usually require sustained technical climbing, but the expedition remains extremely serious. Climbers must cope with thin air, intense winds, subzero temperatures, dehydration, and rapidly changing conditions.
Aconcagua is also part of the famous Seven Summits challenge.
Ojos del Salado
Shared by Argentina and Chile, Ojos del Salado is the world’s highest volcano and the second-highest independent mountain in the Western and Southern hemispheres.
The volcano rises from one of Earth’s driest high-altitude regions. Its Argentine approach is generally more remote and less developed than the more frequently used Chilean route.
Ojos del Salado represents South America in the Volcanic Seven Summits.
Monte Pissis
Monte Pissis is a massive extinct volcanic complex in the high desert of northwestern Argentina. Its broad slopes, remote access, extreme dryness, and high elevation make it a major expedition objective.
Although less famous than Aconcagua, Pissis is one of the highest mountains in the Western Hemisphere.
Fitz Roy
Fitz Roy rises above El Chaltén in Los Glaciares National Park. Its vertical granite faces and unpredictable weather have made it one of the world’s classic technical climbing mountains.
Most visitors experience Fitz Roy from trails such as Laguna de los Tres rather than attempting its summit.
Cerro Torre
Nearby Cerro Torre is renowned for its steep granite walls, ice-coated summit mushroom, and violent Patagonian storms. It is much lower than the northern Andean giants but ranks among Argentina’s most difficult and celebrated climbing objectives.
Lanín and Tronador
Volcán Lanín is a nearly symmetrical volcanic peak on the Argentina–Chile border in Neuquén. It is the centerpiece of Lanín National Park and a popular mountaineering goal.
Cerro Tronador rises between Argentina and Chile near Bariloche. Its name means “thunderer,” referring to the sounds produced by falling ice from its glaciers.
🪨 Geology
Argentina’s mountains were shaped primarily by the continuing interaction between the Nazca and South American tectonic plates. As the oceanic Nazca Plate descends beneath South America, compression uplifts the Andes while magma generated at depth feeds the Andean volcanic chain.
The northern Andes contain enormous stratovolcanoes, calderas, lava domes, and volcanic plateaus. Ojos del Salado, Llullaillaco, Incahuasi, and many neighboring summits were created during repeated episodes of volcanic activity.
Aconcagua has a more complicated history. Although volcanic rocks occur throughout the mountain, its exceptional modern height results largely from tectonic uplift and faulting rather than from a currently recognizable volcanic cone.
Patagonia has been heavily shaped by glaciers. Repeated glacial advances carved deep valleys, cirques, fjords, and lake basins. Around El Chaltén, erosion exposed resistant granite intrusions that now form the sharp towers of Fitz Roy and Cerro Torre.
The Sierras Pampeanas consist largely of old continental rocks raised as fault-bounded blocks during Andean mountain building.
🌿 Flora and Fauna
Argentina’s mountains cross several major ecological zones.
In the Puna, vegetation is low and widely scattered. Tough grasses, tola shrubs, cushion plants, and yareta survive intense sunlight, drought, frost, and strong winds. Vicuñas roam the high plateaus, while flamingos gather around saline lagoons. Andean foxes, mountain viscachas, and condors are also found in the region.
The dry Central Andes support steppe grasses, low shrubs, guanacos, foxes, pumas, and numerous high-altitude birds. Vegetation becomes increasingly sparse with elevation and largely disappears from the highest slopes.
Northern Patagonia contains forests of coihue, lenga, ñire, cypress, and ancient alerce trees. Higher slopes give way to alpine meadows, rock, snowfields, and glaciers.
Patagonian wildlife includes guanacos, huemul deer, pudú, pumas, condors, woodpeckers, and several species of waterfowl. The endangered huemul is protected in mountain parks including Los Glaciares and Perito Moreno.
🥾 Hiking and Climbing in Argentina
Argentina offers everything from short scenic walks to multiweek high-altitude expeditions.
Aconcagua Provincial Park
Visitors who are not attempting the summit can still explore the mountain through shorter routes in the Horcones Valley. Longer treks reach Confluencia and, with appropriate permits and preparation, Plaza de Mulas base camp.
A summit expedition generally requires approximately two to three weeks, including acclimatization and reserve days.
El Chaltén
El Chaltén is often described as Argentina’s trekking capital. Popular routes include:
- Laguna de los Tres
- Laguna Torre
- Loma del Pliegue Tumbado
- Mirador de los Cóndores
- Huemul Circuit
Many day hikes begin directly from town, but the Huemul Circuit is a serious backcountry route requiring river crossings, route-finding, and experience with severe Patagonian weather.
Bariloche and Nahuel Huapi
Bariloche provides access to one of Argentina’s best-developed trail and mountain-hut networks. Popular destinations include Refugio Frey, Cerro López, Laguna Negra, Cerro Catedral, and the challenging Four Refuges traverse.
The combination of lakes, forests, granite peaks, and established refuges makes this one of the country’s best mountain regions for intermediate hikers.
Lanín and Northern Patagonia
The ascent of Volcán Lanín requires strong fitness, suitable snow equipment, and often the assistance of a qualified guide. Conditions vary greatly depending on the season.
Nearby national parks offer easier forest and lake hikes around San Martín de los Andes, Junín de los Andes, and Villa La Angostura.
High Volcanoes of Catamarca and La Rioja
Ojos del Salado, Monte Pissis, Incahuasi, Tres Cruces, and Cerro Bonete are remote expedition mountains. Challenges include:
- Extreme altitude
- Limited water
- Long desert approaches
- Few established shelters
- Complex vehicle logistics
- Large daily temperature changes
- Weak or nonexistent rescue infrastructure
These mountains should not be treated as ordinary trekking peaks simply because their standard routes may contain little technical climbing.
🌤️ Best Time to Visit
The best season depends on the mountain region and planned activity.
Central Andes and Aconcagua
December through February is the principal high-altitude climbing season. November and March may offer quieter conditions but can bring colder temperatures and less predictable weather.
Northwestern Volcanoes
Many expeditions take place between November and March, when access is generally easier. Conditions remain cold throughout the year, particularly at night and above 5,000 meters.
Patagonia
The main trekking season runs from October through April, with the longest days and mildest average temperatures between December and February. Strong winds, rain, sleet, and snow are possible even in midsummer.
Skiing and Winter Activities
Argentina’s ski season generally extends from June through September, depending on snowfall. Major mountain resorts include Cerro Catedral, Las Leñas, Chapelco, Cerro Castor, and Caviahue.
🏔️ Field Guide Tip: Never rely on the calendar alone in Patagonia. Check local trail reports and weather forecasts immediately before departure, even during the middle of summer.
🧭 Major Mountain Parks and Destinations
Aconcagua Provincial Park
This protected area in Mendoza surrounds Aconcagua and the upper Horcones Valley. It offers viewpoints, short walks, base-camp treks, and major climbing routes.
Los Glaciares National Park
Los Glaciares protects Fitz Roy, Cerro Torre, extensive ice fields, glacial lakes, and the famous Perito Moreno Glacier. The park is a UNESCO World Heritage Site and one of the most spectacular mountain regions in the Americas.
Nahuel Huapi National Park
Centered around Lake Nahuel Huapi and Bariloche, this park combines forested mountains, glaciers, lakes, waterfalls, and a large trail network.
Lanín National Park
Lanín National Park protects Volcán Lanín, Andean forests, clear lakes, and stands of ancient monkey puzzle trees known locally as pehuenes.
Los Alerces National Park
Another UNESCO World Heritage Site, Los Alerces contains glacial lakes, mountain forests, and some of the oldest and largest alerce trees in Argentina.
Tierra del Fuego National Park
At the southern end of the country, Tierra del Fuego National Park offers coastal mountains, peatlands, forests, lakes, and trails near Ushuaia.
💡 Fun Facts
- Aconcagua is the highest mountain anywhere outside Asia.
- Argentina contains more 6,000-meter summits than almost any country outside the central Andes.
- Ojos del Salado is both Argentina’s second-highest mountain and the highest volcano on Earth.
- High-altitude Inca ceremonial sites have been discovered on several Argentine mountains, including Llullaillaco and Aconcagua.
- The three exceptionally preserved Inca children discovered near the summit of Llullaillaco were found at one of the world’s highest archaeological sites.
- Fitz Roy and Cerro Torre are thousands of meters lower than Aconcagua but require far more technical climbing skill on their classic summit routes.
- The Andes create a powerful rain-shadow effect, contributing to the dry landscapes of western and southern Argentina.
- Several Argentine mountain names are shared with peaks in other countries, so the province or mountain range should always be checked when identifying a summit.
❓ Frequently Asked Questions
What is the highest mountain in Argentina?
Aconcagua is Argentina’s highest mountain. Argentina’s Instituto Geográfico Nacional gives it an official elevation of 6,960.8 meters, while many international mountain databases use 6,962 meters.
Is Aconcagua entirely in Argentina?
Yes. Aconcagua is located entirely within Mendoza Province, although it rises only a short distance east of the Chilean border.
Is Ojos del Salado in Argentina or Chile?
Ojos del Salado straddles the Argentina–Chile border. It is associated with Catamarca Province in Argentina and the Atacama Region in Chile.
Are all the mountains in Argentina part of the Andes?
No. The Andes are Argentina’s largest and highest mountain system, but the country also contains the Sierras Pampeanas and several smaller interior ranges.
Where is the best hiking in Argentina?
El Chaltén is ideal for dramatic Patagonian day hikes, while Bariloche and Nahuel Huapi offer a larger network of trails and mountain huts. Mendoza is best for high-altitude trekking, and Córdoba provides accessible lower-elevation hikes.
Can beginners climb Aconcagua?
Aconcagua’s Normal Route is not usually considered technically difficult, but it is not a beginner mountain. Climbers require excellent fitness, prior high-altitude experience, proper acclimatization, expedition equipment, and the ability to manage dangerous weather.
What is the best month for hiking in Patagonia?
January and February generally provide the longest daylight and mildest average temperatures. December and March can be less crowded, although conditions remain highly variable throughout the season.
🔗 Related Articles
- Mountains in South America
- The Andes
- Map of the Andes Mountain Range
- Aconcagua
- Ojos del Salado
- Monte Pissis
- Cerro Mercedario
- Fitz Roy
- Cerro Torre
- Fitz Roy Range
- Andes of Patagonia
- The Seven Summits
- The Volcanic Seven Summits
- Mountains by Country
📚 Sources
- Instituto Geográfico Nacional — New Official Height of Aconcagua
- Peakbagger — Andes 6,000-Meter Peaks
- Argentina Travel — Aconcagua Provincial Park
- UNESCO World Heritage Centre — Los Glaciares National Park
- UNESCO World Heritage Centre — Los Alerces National Park
- Smithsonian Global Volcanism Program — World’s Highest Volcano
- Argentina National Parks — Mountain Activity Recommendations
