Aconcagua: Height, Routes, Permits, and How to Train for the Highest Peak in the Americas

Aconcagua is the highest mountain in the Americas and the tallest peak outside Asia. Rising close to 6,960 meters (about 22,840 feet) above sea level in the Andes of western Argentina, it draws thousands of mountaineers every season who want to stand on the roof of the Western Hemisphere and tick one of the Seven Summits. Its normal route is not technical, yet thin air, cold, and wind make it a serious mountaineering expedition. This guide covers the facts, the history of its ascents, the main routes, permits and logistics, the training you need, and what to expect on the final push.

Key facts

• Height: Argentina's Military Geographical Institute lists 6,959 meters (22,831 feet), and a 2001 GPS survey measured 6,962 meters.
• Location: Aconcagua Provincial Park, in the province of Mendoza, about 15 kilometers from the Chilean border.
• Status: top of South America and of the Western Hemisphere, one of the Seven Summits alongside Mount Everest, Denali, and Kilimanjaro.
• First ascent: January 14, 1897, by the Swiss guide Matthias Zurbriggen, on what is now the normal line.
• Main routes: the classic Horcones line, which follows the original 1897 itinerary, and the eastern lines from the Vacas valley.

Where is Cerro Aconcagua?

Cerro Aconcagua stands roughly 112 kilometers northwest of the city of Mendoza, close to the border with Chile. The peak sits inside Aconcagua Provincial Park, which protects the surrounding valleys, ice fields, and arid desert. The usual gateway is the small village of Penitentes or the Puente del Inca area on the international highway to Santiago, a short drive from the park entrance at Laguna Horcones.

Geologically, Cerro Aconcagua formed as the Nazca Plate pushed beneath the South American Plate. It was once an active stratovolcano, but eruptions stopped millions of years ago, and today the massif is a huge block of sedimentary and volcanic rock with ice on its eastern and southern flanks.

The origin of the name is uncertain. Proposed sources include the Quechua language, where Anco Cahuac means White Sentinel and Ackon Cahuak means Sentinel of Stone, the Mapuche Aconca Hue, and the Aymara language, where Janq'u Q'awa means White Ravine. Whatever the original meaning, the name Cerro Aconcagua is now known to mountaineers around the world.

History of ascents

The first recorded attempt came in 1883, but success had to wait for the British expedition led by Edward FitzGerald in 1896 and 1897. FitzGerald never reached the top despite several attempts, but his Swiss guide, Matthias Zurbriggen, stood on the summit alone on January 14, 1897. A few weeks later, on February 13, Stuart Vines and Nicola Lanti repeated the original route.

Long before European explorers arrived, the Inca went high on these slopes. In 1985, an Inca mummy was found at about 5,167 meters on the massif, evidence of ritual ascents centuries earlier.

Other milestones followed. On March 8, 1934, a Polish expedition with Konstanty Narkiewicz Jodko, Stefan Daszynski, Wiktor Ostrowski, and Stefan Osiecki climbed the ice on the east side, now called the Polish Glacier. In 1954, a French team led by Rene Ferlet climbed the huge South Face, still one of the hardest alpine walls in the Andes. In 2019, a group of Indigenous Aymara women from Bolivia, known as the cholitas, reached the top in their traditional skirts, a story that drew attention far beyond the mountaineering world.

Records keep falling. The speed record for an ascent and descent from Horcones belongs to the American runner Tyler Andrews, who did it in 11 hours and 24 minutes in 2023. Earlier speed marks were set by well known mountain runners, and speed ascents remain a popular way to test personal limits. These attempts usually start and finish at the Horcones entrance. Tyler Armstrong reached the top at age 9 in December 2013, and Scott Lewis did so at age 87 in 2007, which shows how wide the range of ascents can be over the years.

Main routes

The normal route

The normal route climbs the northwest side of the mountain from the Horcones valley. It is often called the highest non technical climb in the world, because in good conditions it does not require ropes or technical skills. It follows a well established series of camps:

• Confluencia: about 3,380 meters, the first acclimatization stop.
• Plaza de Mulas: about 4,370 meters, the main base camp of the classic line, with medical checks, outfitters, and park rangers.
• Nido de Condores: about 5,570 meters, a windy camp on a broad plateau.
• Berlin and Colera: about 5,940 and 6,000 meters, the final camps before the top.

From the last of these camps, the summit push passes the Independencia refuge, crosses the exposed Gran Traverse, and ends with the Canaleta, a steep gully of loose scree that leads to the summit ridge. Expect 8 to 12 hours there and back on summit day.

The Polish Glacier route and the traverse

The Vacas valley approach leads to Plaza Argentina, the eastern hub at about 4,200 meters. The direct line up the ice climbs steep snow and requires crampons, an ice axe, and rope work, so it suits climbers with alpine experience. Much more popular is the Polish Traverse, also called Falso de los Polacos, which climbs toward the foot of the ice and then traverses the north slopes to join the normal route near the top. It is longer, quieter, and more scenic than the classic approach, and many guides prefer it for acclimatization because it crosses the whole mountain. A trip through the Vacas valley also offers some of the best views of the eastern ice fields.

The South Face

The South Face rises nearly 3,000 meters above the Horcones Inferior, the largest glacier on the peak. It is a serious alpine wall with hanging ice, rockfall, and difficult mixed ground, reserved for experienced alpinists with Himalayan or Patagonian experience. For a sense of that level of commitment, read our guides to Fitz Roy and Patagonia's ranges.

Season, permits, and logistics

The official season runs from mid November to the end of March, and the busiest time is from mid December to the end of January. Weather is most stable in January, though strong winds known locally as the viento blanco can strike at any moment.

Every visitor needs a permit issued by the provincial park. You register online, pay the fee, and finalize the permit in person in Mendoza before heading to the park, and rangers check it at Laguna Horcones or at the Vacas valley entrance. The price depends on the season, the chosen line, and your nationality. A summit permit allows a maximum stay of 20 days, and all climbers must pass a free medical check before going higher.

Most expeditions last close to three weeks, including the approach, acclimatization rotations, and spare weather time. Mules carry group gear and duffels to the lower camps, and many teams hire porters for loads above them. Climbing with professional guides is common: the lead guide will set the acclimatization plan, manage food and tents, and make the key decisions when the weather turns. Independent parties should have previous experience in big mountains and a solid team.

Altitude and summit success

The real difficulty of climbing Aconcagua is altitude. On top, air pressure is only about 40 percent of the pressure at sea level, and most climbers feel some level of altitude sickness. Success rates are often estimated at 30 to 40 percent, and the most common reasons for turning back are acute mountain sickness, exhaustion, cold, and wind.

To improve your chances, climb high and sleep low, carry loads up before moving camp, drink more than you think you need, and descend at the first sign of serious symptoms. Fueling matters as much as fitness on a long expedition; our nutrition guide explains how to eat for performance and recovery.

Training for Aconcagua

Anyone interested in climbing Aconcagua should arrive in excellent physical condition. The mountain tests endurance, carrying loads day after day in thin air, more than technical skill. A solid training plan should start at least four to six months before departure, and your personal training log will tell you whether you are ready.

Aerobic base and load carrying

Build a strong aerobic base with long hikes, stair sessions, and steady efforts. Progress to carrying a pack of 15 to 20 kilograms on steep trails, with back to back outings to simulate expedition life. Our uphill workout program lays out a full plan, and our endurance training article explains how to build sustained effort.

Strength and grip training

Leg strength, core stability, and upper body strength help with heavy loads and long descents. Our strength exercises cover the basics. Grip training is often overlooked: on steep ice or fixed lines, you will hold an ice axe, trekking poles, and ropes for hours with cold hands. Short sessions of hangboarding on large edges build forearm endurance without stressing tendons, and a home hangboard makes that easy to schedule around your other training. See our structured training guide to fit it into a weekly plan.

Skills and experience

Before you go, practice walking in crampons, self arrest with an ice axe, and moving efficiently on loose ground. A previous alpine trip to 5,000 or 6,000 meters is strongly recommended, ideally with a guide who can lead you through the basics and a team you can lead in turn. If you come from the crag or the gym, our lessons guide and glossary of terms help fill the gaps.

Gear for climbing Aconcagua

The standard line requires full cold weather equipment even without technical climbing:

• Double or insulated boots compatible with crampons.
• Crampons, an ice axe, and trekking poles.
• A down suit or heavy down jacket and pants for the final day.
• A sleeping bag rated to about minus 30 degrees Celsius.
• Layered gloves and mittens, a warm hat, a buff, and category 4 sunglasses.
• Comfortable footwear for the trek in, plus personal items like sunscreen and a headlamp.

For full checklists, read our guides to mountain gear, ice axes and crampons, approach shoes, hats, and gloves.

How it compares with other mountains

It is often a stepping stone between Mount Kilimanjaro and the Himalayas, and it suits climbers who want to test their personal limits. It is far higher than the Matterhorn but much less technical, and it offers excellent preparation for Denali or an 8,000 meter peak. Compared with Mount Everest, it is cheaper, shorter, and does not require supplemental oxygen, but it still teaches the core lessons of expedition life: patience, acclimatization, and good decisions when the wind picks up. Many alpine guides describe it as the best school for big mountains, and they often lead clients there before an 8,000 meter ascent.

Conclusion

Aconcagua offers a rare combination: the highest point in the Americas, a route that does not demand technical climbing, and the full challenge of expedition mountaineering. Most climbers reach the summit by the normal route from Plaza de Mulas or by the traverse from the Vacas valley, after nearly three weeks of careful acclimatization. Arrive with strong aerobic fitness, solid grip and leg strength, the right gear, and the patience to wait for a good weather window. Respect the mountain, follow your plan, and the roof of the Western Hemisphere can become one of the best experiences of your life.

FAQ

How high is Aconcagua?

The peak stands close to 6,960 meters above sea level. The official national survey lists 6,959 meters, and a 2001 GPS survey measured 6,962 meters. It is the highest peak in the Americas and the tallest outside Asia.

Is Aconcagua a technical climb?

The classic line and the traverse are not technical in good conditions, but they require crampons, an ice axe, and serious cold weather equipment. The direct ice line and the South Face are technical alpine ascents.

How long does it take to climb Aconcagua?

Most expeditions take 18 to 20 days, including the approach, acclimatization rotations, the summit push, and spare days for bad weather. The original FitzGerald party spent far longer on the mountain.

Do you need a guide to climb Aconcagua?

No, independent climbers can obtain a permit, but many choose a guided team for logistics, acclimatization planning, and safety on the final push.

When is the best time to go?

The official season runs from mid November to the end of March. The most stable weather usually comes from late December to late January, which is also the busiest period.