Introduction
The highest volcanoes on Earth are found in the Andes of South America, where the subduction of the Nazca Plate beneath the South American Plate has created a chain of massive stratovolcanoes. This tectonic collision zone stretches over 7,000 kilometers along the western edge of the continent, and the Central Volcanic Zone between Chile, Argentina, and Bolivia hosts the greatest concentration of ultra-high volcanic peaks anywhere on the planet.
Most of these volcanoes are dormant but not extinct. Many have erupted within the last few thousand years and could erupt again. Beyond the Andes, several other volcanic giants on different continents reach impressive heights, from Africa's Kilimanjaro to Europe's Elbrus and Asia's Damavand. Together, these peaks reveal the immense power of plate tectonics and hotspot volcanism in shaping Earth's highest landscapes.
1. Ojos del Salado, Chile/Argentina
- Elevation: 6,893 m (22,615 ft)
- Last Eruption: ~1,000-1,500 years ago
- Record: Highest volcano on Earth
Ojos del Salado straddles the Chile-Argentina border in the Atacama Desert region and holds the title of the highest volcano on Earth. It is also the second-highest peak in both the Western and Southern Hemispheres, surpassed only by Aconcagua (6,961 m), which lies about 600 kilometers to the south. The volcano sits in one of the driest environments on the planet, and its summit crater contains a small lake at approximately 6,390 meters—widely considered the highest lake in the world.
Although Ojos del Salado has not erupted in roughly 1,000 to 1,500 years, sulfur deposits and fumarolic activity near the summit indicate that the volcano is not extinct. The peak can be climbed without technical gear, making it a popular high-altitude mountaineering objective, though the extreme elevation and dry, cold conditions make altitude sickness a serious concern. In 2007, a modified Suzuki Samurai was driven to an altitude of 6,688 meters on its slopes, setting the world record for the highest altitude reached by a wheeled vehicle.
2. Llullaillaco, Chile/Argentina
- Elevation: 6,739 m (22,110 ft)
- Last Eruption: 1877
- Discovery: Inca mummies found at summit
Llullaillaco rises on the Chile-Argentina border in the Puna de Atacama, about 300 kilometers southeast of Ojos del Salado. It is the highest historically active volcano in the world, with its most recent confirmed eruption occurring in 1877. The stratovolcano is built from andesitic and dacitic lava flows, and its symmetrical cone is capped by permanent snow and ice fields despite the extreme aridity of the surrounding desert.
In 1999, an archaeological expedition led by Johan Reinhard discovered three remarkably preserved Inca child mummies near the 6,739-meter summit. The children, known as the "Children of Llullaillaco," had been sacrificed in a ritual called capacocha more than 500 years ago. The extreme cold and dry conditions preserved them so well that blood was still found in their hearts and lungs, and CT scans revealed their internal organs were largely intact. The mummies are now housed at the Museum of High Altitude Archaeology (MAAM) in Salta, Argentina, and are considered among the best-preserved human remains ever found.
3. Tipas, Argentina
- Elevation: 6,658 m (21,844 ft)
- Status: Dormant
- Location: Catamarca Province
Tipas is a massive volcanic complex in the Catamarca Province of northwestern Argentina, situated in the remote Puna de Atacama region. Unlike the classic single-cone stratovolcanoes that dominate the Andes, Tipas consists of a sprawling cluster of overlapping volcanic domes, lava flows, and a large caldera system. Its highest point reaches 6,658 meters, placing it among the tallest volcanic structures on Earth, yet it remains one of the least visited and least studied of the Andean giants.
The volcano is classified as dormant, with no historically recorded eruptions, though its youthful lava flows suggest activity within the Holocene (the last 11,700 years). The extreme remoteness of the region—there are no paved roads for many kilometers in any direction—has limited both scientific research and mountaineering activity. Tipas is surrounded by other high volcanic peaks including Cerro Bonete Chico and the Ojos del Salado massif, making this corridor of the Andes a remarkable concentration of volcanic elevation.
4. Nevado Ojos del Salado (Pissis area), Argentina
- Elevation: 6,795 m (if counted separately)
- Type: Stratovolcano complex
- Region: Puna de Atacama
The Puna de Atacama, a high plateau straddling the Chile-Argentina border between roughly 24°S and 27°S latitude, contains the densest concentration of volcanoes above 6,000 meters anywhere on Earth. This region includes not only Ojos del Salado and Llullaillaco but also a cluster of massive volcanic edifices such as Monte Pissis (6,795 m), Bonete Chico, and Incahuasi. Whether all of these qualify as standalone volcanoes or subsidiary peaks of larger complexes is a matter of ongoing geological debate.
Monte Pissis itself was long thought to be the third-highest peak in the Western Hemisphere, though GPS surveys have revised its elevation. The entire Puna de Atacama region was volcanically active during the late Pleistocene and Holocene, driven by the subduction of the Nazca Plate. Lava flows, ignimbrite sheets, and caldera structures dominate the landscape, and the area remains geothermally active with hot springs found at lower elevations. The extreme aridity—some weather stations in this region have never recorded rainfall—has preserved volcanic landforms in extraordinary detail.
5. Cotopaxi, Ecuador
- Elevation: 5,897 m (19,347 ft)
- Status: Active (erupted 2015)
- Glacier: Equatorial glacier-capped
Cotopaxi is a stratovolcano in the Cordillera Oriental of the Ecuadorian Andes, located about 50 kilometers south of Quito. It is one of the highest active volcanoes in the world and is famous for its near-perfect conical shape and its summit glacier, which persists despite being located just one degree south of the equator. The volcano has erupted more than 50 times since 1738, with major eruptions in 1744, 1768, 1877, and most recently in 2015 when it produced ash columns and pyroclastic flows.
The 1877 eruption was particularly devastating: it melted large portions of the summit glacier, generating lahars (volcanic mudflows) that traveled over 100 kilometers down river valleys, destroying towns and farmland. This lahar risk remains the greatest hazard today, as more than 300,000 people live in zones that could be inundated by mudflows in a major eruption. Cotopaxi National Park, established in 1975, is one of Ecuador's most visited protected areas, and the volcano's name is believed to derive from Quechua words meaning "Neck of the Moon," referring to how moonlight illuminates the glaciered summit.
6. Kilimanjaro, Tanzania
- Elevation: 5,895 m (19,341 ft)
- Status: Dormant
- Glaciers: Rapidly shrinking
Mount Kilimanjaro is the highest peak in Africa and the tallest freestanding mountain in the world, rising nearly 5,000 meters above the surrounding plains of northeastern Tanzania near the Kenyan border. The mountain is actually a massive stratovolcano with three distinct volcanic cones: Kibo (the highest, home to the Uhuru Peak summit), Mawenzi, and Shira. Kibo's summit contains a 2.5-kilometer-wide caldera with a smaller ash pit inside it, and fumaroles within the crater still emit sulfurous gases, indicating the volcano is dormant rather than extinct.
Kilimanjaro is renowned for its equatorial glaciers, which have been dramatically retreating over the past century. Ice core studies show that the summit glaciers have lost more than 80% of their area since they were first surveyed in 1912, and some researchers have predicted they could disappear entirely by the 2040s or 2050s. The mountain passes through five distinct climate zones from base to summit—from tropical rainforest to arctic conditions—making it one of the most ecologically diverse single mountains on Earth. Each year, roughly 35,000 climbers attempt the summit, making it one of the world's most popular high-altitude trekking destinations.
7. Elbrus, Russia
- Elevation: 5,642 m (18,510 ft)
- Status: Dormant
- Last Eruption: ~50 AD
Mount Elbrus is a dormant stratovolcano in the Caucasus Mountains of southern Russia, near the border with Georgia. It is the highest peak in Europe (under the most commonly used continental boundary definition) and one of the Seven Summits—the highest mountains on each continent. Elbrus has twin summits, both of which are dormant volcanic domes: the west summit reaches 5,642 meters and the east summit stands at 5,621 meters. The two peaks are separated by a saddle at about 5,416 meters.
The volcano last erupted around 50 AD, but it is not considered extinct. Geothermal activity is evident in hot springs on its flanks, and volcanic gases still seep from fumaroles near the summit. Elbrus is covered by 22 glaciers that feed rivers flowing into the Caspian and Black Sea basins. The mountain has a well-developed infrastructure for climbers, including a cable car system that reaches 3,847 meters and a series of huts along the standard south route. Despite this accessibility, Elbrus sees a significant number of fatalities each year due to sudden weather changes, high winds, and whiteout conditions on the exposed upper slopes.
8. Mount Damavand, Iran
- Elevation: 5,610 m (18,406 ft)
- Status: Dormant (fumaroles active)
- Location: Alborz Mountains
Mount Damavand is a stratovolcano in the Alborz mountain range of northern Iran, located about 70 kilometers northeast of Tehran. It is the highest peak in Iran, the highest volcano in all of Asia, and the highest peak in the Middle East. The volcano's nearly symmetrical cone rises prominently above the surrounding range and has been an important symbol in Persian mythology and culture for millennia—in the epic Shahnameh, the three-headed dragon Azhidahaka is said to be chained within the mountain.
Damavand last erupted approximately 7,300 years ago, but it remains classified as potentially active. Fumaroles near the summit vent sulfurous gases, and numerous hot springs dot the mountain's lower flanks, some reaching temperatures of 60°C. The hot springs at Larijan on the southern slopes have been used as thermal baths for centuries. Climbing Damavand is popular among Iranian mountaineers and international visitors alike, with the standard south-face route being non-technical but demanding due to the altitude and the sulfur fumes encountered near the summit crater.
Key Facts
- Ojos del Salado (6,893 m) is the highest volcano on Earth and the second-highest peak in the Americas after Aconcagua.
- The top four highest volcanoes are all located in the Central Volcanic Zone of the Andes along the Chile-Argentina border.
- Llullaillaco is the highest historically active volcano and yielded perfectly preserved 500-year-old Inca child mummies.
- Cotopaxi is one of the highest active volcanoes and poses significant lahar risks to nearby populations in Ecuador.
- Kilimanjaro's glaciers have lost over 80% of their area since 1912 and may disappear entirely within decades.
- Elbrus, Kilimanjaro, and Damavand each hold the title of highest volcano on their respective continents.
Fun Facts
- Ojos del Salado's summit lake at 6,390 m is the highest lake in the world, and a vehicle was driven to 6,688 m on its slopes.
- The Inca child mummies on Llullaillaco are so well preserved that blood was found in their hearts and their DNA has been fully sequenced.
- Cotopaxi's name means "Neck of the Moon" in the local Quechua language, and its 1877 lahars traveled over 100 km.
- Mount Damavand features in one of the oldest stories in Persian literature, as the prison of a mythical dragon in the Shahnameh.
- Kilimanjaro passes through five climate zones from base to summit, spanning tropical rainforest to arctic ice.
Final Thoughts
The world's highest volcanoes are towering Andean giants that combine extreme altitude with volcanic power. From the summit of Ojos del Salado in the hyper-arid Atacama to the glaciered cone of Cotopaxi near the equator, these volcanic peaks are among Earth's most impressive mountains. Beyond the Andes, continental high points like Kilimanjaro, Elbrus, and Damavand remind us that volcanism has shaped some of the most iconic landscapes on every inhabited continent.