The World's Greatest Mountains

What makes a mountain? It is a question that seems simple enough at first glance. We picture towering peaks, jagged ridges, and snow-capped summits. Yet, defining a mountain proves to be a surprisingly complex task. There is no single, universally accepted geological definition. Some authorities consider any landform rising above 600 meters (approximately 2,000 feet) to be a mountain, while others suggest a threshold of 300 meters. Still others focus on topographic prominence—the height of a summit relative to the lowest contour line encircling it and no higher summit—as a key characteristic. A mountain could be thousands of feet high but only rise a few meters above the surrounding terrain. Therefore, prominence is also an important factor.

The processes that create these magnificent landforms are as varied as their shapes and sizes. The Earth's crust is in constant motion, and it is this dynamic activity that gives birth to mountains. The most common type of mountain, the fold mountain, is formed when two of the Earth's tectonic plates collide. The immense pressure buckles and folds the rock, pushing it upwards to create vast ranges like the Himalayas. Another type, the fault-block mountain, is created when cracks in the Earth's crust force blocks of rock up or down. The Sierra Nevada in the United States is a prime example of this formation. Volcanic mountains, as the name suggests, are formed by the eruption of magma from the Earth's interior. This molten rock cools and solidifies, building up over time to create conical peaks like Mount Fuji. Finally, some mountains are the result of millions of years of erosion, where wind, water, and ice carve away at the landscape, leaving behind the most resistant rock as isolated peaks.

Mountains are far more than just geological curiosities; they are vital to life on Earth. They play a crucial role in determining global and regional climates and are the source of most of the world's rivers. These "water towers of the world" provide fresh water to a significant portion of the global population. Their varied elevations and microclimates create a wide array of habitats, making them hotspots of biodiversity. Mountain regions cover about 27% of the world's land surface yet are home to over 85% of the world's species of amphibians, birds, and mammals. Many of our most important food crops also originated in these highland regions. From the tropical forests that cling to their lower slopes to the treeless alpine zones at their highest reaches, mountains support a remarkable diversity of life.

Beyond their physical and ecological importance, mountains hold a profound cultural and spiritual significance for humanity. For millennia, they have been seen as the abode of gods, the source of sacred rivers, and places of spiritual revelation. Mount Olympus was the mythical home of the Greek gods, while Mount Kailash in Tibet is considered a sacred place in four different religions: Hinduism, Buddhism, Jainism, and Bön. Countless other peaks around the world, from Mount Sinai in Egypt to Uluru in Australia, are revered by different cultures as places of immense power and spiritual importance. This reverence is reflected in the myths, legends, and religious traditions of societies across the globe.

The allure of mountains has also given rise to the adventurous pursuit of mountaineering. The desire to reach their summits has driven men and women to push the limits of human endurance. The history of this endeavor is a story of courage, innovation, and, at times, tragedy. It began in earnest on August 8, 1786, when Jacques Balmat and Dr. Michel-Gabriel Paccard made the first ascent of Mont Blanc, ushering in the age of mountain climbing as a sport. The 19th and early 20th centuries saw a flurry of first ascents, particularly in the Alps. The focus then shifted to the greater ranges of the Himalayas and the Karakoram. The 1953 British expedition that saw Sir Edmund Hillary and Tenzing Norgay reach the summit of Mount Everest for the first time was a landmark moment in this history. Over the decades, mountaineers have continued to tackle ever more challenging routes, often with minimal equipment and without the use of supplemental oxygen, embodying a spirit of exploration that continues to this day.

A significant challenge in high-altitude mountaineering is the "death zone," a term for altitudes above 8,000 meters (26,247 feet) where the oxygen level is insufficient to sustain human life for an extended period. Conceived by Swiss doctor Edouard Wyss-Dunant in 1953, he initially called it the "lethal zone". At this altitude, the atmospheric pressure is less than 356 millibars, and the body's store of oxygen is consumed faster than it can be replenished. This leads to the deterioration of bodily functions, loss of consciousness, and ultimately, death if a climber remains in the zone for too long without supplemental oxygen. The fourteen highest peaks in the world, all located in the Himalayas and Karakoram, have summits that lie within this perilous zone.

For many climbers, a major goal is to conquer the "Seven Summits," the highest mountains on each of the seven continents. This mountaineering challenge was first conceived by American businessman Dick Bass, who completed the feat on April 30, 1985. The list of the Seven Summits includes Mount Everest in Asia, Aconcagua in South America, Denali in North America, Kilimanjaro in Africa, Mount Elbrus in Europe, Vinson Massif in Antarctica, and either Puncak Jaya or Mount Kosciuszko for the Australian continent, depending on the definition used. Completing this challenge is a pinnacle achievement for any mountaineer, requiring immense dedication, resources, and courage.

This book will take you on a journey to twenty-five of the world's greatest mountains. We will explore their geological origins, their unique ecosystems, the stories of their first ascents, and the cultural significance they hold for the people who live in their shadows. From the towering heights of the Himalayas to the volcanic peaks of the Pacific Ring of Fire, we will discover the majesty and diversity of these incredible natural wonders. Each chapter will focus on a single peak, delving into the specific challenges and triumphs that have defined its history. We will meet the legendary climbers who pushed the boundaries of what was thought possible and learn about the delicate balance of life that exists in these extreme environments. So, let us begin our ascent and explore the world's greatest mountains.

In the heart of the great Himalayan range, straddling the border of Nepal and the Tibet Autonomous Region of China, stands a mountain of such colossal scale that it has captured the human imagination for centuries. This is Mount Everest, the highest point on Earth. Its summit, a breathtaking 8,848.86 meters (29,031.7 feet) above sea level, scrapes the lower limits of the stratosphere, a realm of punishing winds and perilously thin air. Part of the Mahalangur Himal sub-range, Everest is the stunning result of immense geological forces that began some 50 million years ago. The relentless northward push of the Indian tectonic plate into the Eurasian plate buckled the Earth's crust, thrusting the seabed of the ancient Tethys Ocean skyward. This monumental collision, which continues to this day and causes the Himalayas to grow by a few millimeters each year, created the jagged, ice-sculpted peaks that define the roof of the world.

For centuries, the mountain was known by its local names. In Tibet, it is Chomolungma, meaning "Goddess Mother of the World." In Nepal, it is Sagarmatha, which can be translated as "Goddess of the Sky." Both names reflect a deep spiritual reverence for the peak, viewing it not as a conquest but as a sacred entity. The name "Everest" is a relatively recent, and somewhat controversial, addition. In the mid-19th century, the Great Trigonometrical Survey of India, a British-led project to map the subcontinent, identified the mountain, then designated "Peak XV," as the world's highest. In 1865, against the wishes of the man himself, the Royal Geographical Society officially named it after Sir George Everest, the former British Surveyor General of India. Everest himself had argued for the preservation of local names, but his protests were overruled.

The allure of this remote and forbidding peak proved irresistible to a certain breed of adventurer. The early 20th century saw the dawn of the mountaineering age on Everest, with British expeditions dominating the first attempts. These early forays were characterized by tweed jackets, rudimentary oxygen sets, and a trial-and-error approach to high-altitude climbing. The 1922 expedition saw the first time climbers exceeded an altitude of 8,000 meters. Two years later, in 1924, George Mallory and Andrew "Sandy" Irvine made a fateful attempt on the summit from which they would never return. They were last seen "going strong for the top" through a break in the clouds, leaving behind one of mountaineering's most enduring mysteries: did they reach the summit before they perished? Mallory's body was finally discovered in 1999, but the question of whether he and Irvine were the first to stand on top of the world remains unanswered.

It would take nearly three more decades of struggle, innovation, and tragedy before the summit was definitively reached. The breakthrough came on May 29, 1953, a date etched in the annals of exploration. On that day, as part of the ninth British expedition to the mountain, New Zealander Edmund Hillary and Sherpa Tenzing Norgay stood on the summit of Everest, the first humans confirmed to have done so. The expedition, led with military precision by Colonel John Hunt, was a massive undertaking, involving over 350 porters to carry tons of equipment to the base of the mountain. The final push involved establishing a series of high camps, a methodical and exhausting process. A first attempt by Tom Bourdillon and Charles Evans came within a mere 100 meters of the summit before being forced to turn back due to malfunctioning oxygen equipment. Two days later, Hillary and Tenzing made their bid. Their final obstacle was a formidable 12-meter (40-foot) rock face, now famously known as the Hillary Step. Hillary, with his characteristic grit, wedged himself up a crack in the rock, and Tenzing followed. At 11:30 a.m., they arrived at the summit, spending only 15 minutes in the thin air to take photographs and bury some small offerings in the snow before beginning their perilous descent. News of their success reached London on the morning of Queen Elizabeth II's coronation, a fitting tribute to a new Elizabethan age of adventure.

Today, climbers primarily follow two main routes to the summit: the Southeast Ridge from Nepal, the route taken by Hillary and Tenzing, and the North Ridge from Tibet. Both are immensely challenging and present their own unique set of obstacles. The southern route begins with a trek to Everest Base Camp at an altitude of 5,364 meters (17,598 feet). From there, the ascent proper begins with what is arguably the most dangerous section of the entire climb: the Khumbu Icefall. This treacherous, ever-shifting river of ice is a chaotic maze of deep crevasses and towering ice blocks, or seracs, some the size of buildings. The glacier moves at a rate of up to 1.2 meters per day, causing the landscape to change constantly and unpredictably. To navigate this dangerous terrain, "Icefall Doctors," a dedicated team of Sherpas, establish a route at the beginning of each climbing season using a network of ropes and aluminum ladders to bridge the gaping crevasses. Even with these precautions, the Khumbu Icefall remains a deadly hazard, the site of numerous tragedies, including a devastating avalanche in 2014 that claimed the lives of 16 Sherpa guides.

Above the icefall, climbers navigate the Western Cwm, a vast, glacier-filled valley, before ascending the Lhotse Face, a steep wall of ice, to reach the South Col, where the final high camp is established at about 8,000 meters. From here, the summit push begins in the dead of night. Climbers ascend a triangular face to a ridge known as "The Balcony," then press on to the South Summit. The final challenge is the aforementioned Hillary Step, a near-vertical rock face that, at this extreme altitude, represents a significant technical hurdle.

The northern route, approached from Tibet, is often considered the more technically demanding of the two. It involves a long traverse along the North Ridge to reach the summit, exposing climbers to harsh winds. The key obstacles on this route are a series of rock buttresses known as the First, Second, and Third Steps. The Second Step, a sheer rock face, was historically the most difficult part of the climb on the north side. It was first climbed in 1975 by a Chinese team who installed a ladder that has been used by almost all subsequent expeditions.

No discussion of Everest is complete without acknowledging the indispensable role of the Sherpa people. An ethnic group who migrated from eastern Tibet to the Khumbu region of Nepal centuries ago, the Sherpas possess a remarkable physiological adaptation to high altitudes. Their unique hemoglobin-binding capacity and increased nitric oxide production allow them to perform incredible feats of strength and endurance in the oxygen-deprived environment of the high Himalayas. Initially subsistence farmers and traders, their lives became intertwined with mountaineering in the early 20th century, when they were hired by British expeditions as porters and guides. Today, the term "sherpa" has become almost synonymous with a high-altitude guide, a testament to their unparalleled expertise. They are the true backbone of Everest expeditions, performing the grueling and often dangerous work of fixing ropes, carrying supplies, setting up camps, and guiding clients to the summit. Their deep cultural and spiritual connection to the mountains is profound; they revere Everest as a deity and perform a Puja ceremony at the beginning of each expedition to ask the mountain for safe passage.

Despite advances in equipment and forecasting, Everest remains a place of extreme danger. The "death zone" above 8,000 meters presents the greatest challenge to human physiology. The lack of oxygen leads to a host of debilitating conditions, including hypoxia, frostbite, and high-altitude cerebral and pulmonary edema. Judgment becomes impaired, and the body begins to shut down. The mountain is also subject to sudden and violent storms, with winds that can easily exceed 160 kilometers per hour.

The inherent risks of climbing Everest were brought into sharp focus by the tragic events of May 10-11, 1996, when a sudden blizzard engulfed several expedition teams high on the mountain. A combination of factors, including bottlenecks at the Hillary Step that caused long delays, a later-than-advisable push for the summit, and the unexpected ferocity of the storm, led to disaster. In the ensuing chaos, eight climbers lost their lives, making it the deadliest single day on the mountain up to that time. The disaster, widely publicized in books and films, raised serious questions about the growing commercialization of Everest, where paying clients, some with limited experience, were being guided to the summit.

Since Hillary and Tenzing's historic first ascent, thousands of climbers have reached the summit of Everest, a testament to the enduring power of this magnificent mountain to inspire and challenge. The story of Everest is also one of evolving human achievement. In 1975, Junko Tabei of Japan became the first woman to stand on the summit. Just three years later, in 1978, Reinhold Messner of Italy and Peter Habeler of Austria accomplished what was once thought impossible: they reached the summit without the use of supplemental oxygen, a feat that redefined the limits of human endurance at extreme altitude. Messner then went a step further in 1980, completing the first-ever solo ascent of the mountain, also without supplemental oxygen.

The mountain continues to evolve, not always for the better. The dramatic increase in the number of climbers has led to concerns about overcrowding, especially on the final summit ridge, and the environmental impact of so many people on a fragile ecosystem. Issues with waste disposal and the visible effects of climate change on the mountain's glaciers are pressing concerns for the future. Yet, for all the challenges and controversies, Mount Everest remains the ultimate symbol of nature's grandeur and the unquenchable human spirit of exploration. It is, and will likely always be, the roof of the world.

In the desolate heart of the Karakoram Range, on the border between Pakistan and China, stands a peak of such formidable geometry and brutal reputation that it is known simply as the "Savage Mountain". This is K2, the second-highest mountain on Earth at 8,611 meters (28,251 feet). While it concedes over 200 meters to Mount Everest, for the serious mountaineer, K2 represents the ultimate prize. It is a steeper, more technically demanding, and far more dangerous climb than its taller cousin. Its remote location and notoriously unpredictable weather systems combine to create an environment of extreme hostility, where the margin for error is virtually nonexistent. For every four climbers who have stood on its summit, approximately one has died trying, a statistic that speaks volumes about its savage character.

Unlike Everest, with its evocative local names of Chomolungma and Sagarmatha, K2's designation is a curious relic of 19th-century bureaucracy. In 1856, Thomas Montgomerie, a British surveyor with the Great Trigonometrical Survey of India, sketched the prominent peaks of the Karakoram from a distance of over 200 kilometers. He labeled them sequentially, with a "K" for Karakoram. The peak we now know as K2 was the second he noted. The survey's policy was to use local names where possible, and K1 was soon identified as Masherbrum. K2, however, was so remote and hidden from local villages that it appeared to have no common local name. A suggestion to name it Mount Godwin-Austen, after an early British explorer, never gained widespread traction. And so, the surveyor's stark, unromantic notation stuck—a name that, as Italian climber Fosco Maraini later noted, aptly reflects the mountain's character: "just the bare bones of a name, all rock and ice and storm and abyss."

The mountain's forbidding appearance did little to deter early adventurers. The first serious attempt was made in 1902 by an Anglo-Swiss expedition that included the infamous occultist Aleister Crowley. They reached 6,525 meters before being turned back by a combination of bad weather and internal strife. A more significant expedition followed in 1909, led by the Italian royal, Prince Luigi Amedeo, Duke of the Abruzzi. His team scouted a route up the southeast ridge, which would later be named the Abruzzi Spur, and reached an altitude of about 6,250 meters before concluding the mountain was unclimbable. The route they pioneered, however, would become the standard path to the summit for most future expeditions.

American teams made crucial progress in the late 1930s. In 1938, an expedition led by Charles Houston meticulously scouted the Abruzzi Spur and surmounted a key obstacle, a treacherous 30-meter rock face at 6,700 meters that became known as House's Chimney, after climber Bill House who led the pitch. Houston and Paul Petzoldt reached a high point of around 7,900 meters before retreating. The following year, Fritz Wiessner's American expedition came tantalizingly close to the summit, reaching an estimated 8,370 meters before being forced to descend. The expedition ended in tragedy when Dudley Wolfe and three Sherpas sent to rescue him vanished high on the mountain, a stark early reminder of K2’s lethality.

After the Second World War, the race to be the first to conquer K2 intensified. The prize would ultimately go to Italy, in a large-scale national expedition in 1954, led with an iron fist by geologist Ardito Desio. The expedition was a massive undertaking, plagued by logistical challenges and Desio's autocratic leadership style, which earned him the nickname "il Ducetto" (little Mussolini) from his own climbers. The team followed the Abruzzi Spur, painstakingly establishing a series of high camps in the face of relentless storms. One of the team members died unexpectedly from pneumonia, and at one point Desio considered abandoning the effort entirely.

On July 31, 1954, Lino Lacedelli and Achille Compagnoni became the first men to stand on the summit of K2. Their achievement, however, was immediately overshadowed by one of the most bitter and long-running controversies in mountaineering history. The official account, written by Desio, largely erased the critical contributions of the expedition's youngest climber, Walter Bonatti, and a local Hunza porter, Amir Mehdi. Bonatti and Mehdi had been tasked with carrying 18-kilogram oxygen cylinders up to Camp IX for the summit team. When they arrived at the pre-arranged location late in the day, they found the camp was gone.

Compagnoni and Lacedelli had deliberately moved the final camp to a higher, more difficult-to-reach location. It was later alleged this was done out of fear that the phenomenally strong Bonatti might attempt a summit bid himself. As darkness fell, with shouts to the summit team going unanswered, Bonatti and Mehdi were forced into a desperate, unplanned open-air bivouac at over 8,100 meters, without a tent or sleeping bags. They miraculously survived the night, though Mehdi suffered severe frostbite that would lead to the amputation of all his toes. The next morning, they left the oxygen canisters and staggered down the mountain, while Lacedelli and Compagnoni retrieved the bottles and proceeded to the summit.

For over fifty years, the official story maligned Bonatti, with Compagnoni even accusing him of attempting to sabotage the summit push. Bonatti fought tirelessly to clear his name, eventually winning a defamation lawsuit in 1966. It wasn't until 2004, when Lacedelli published his own account confirming the camp had been moved deliberately, and 2007, when the Italian Alpine Club finally published a revised official report, that Bonatti's version of events was vindicated. The saga of the first ascent remains a cautionary tale of ambition, betrayal, and the immense pressures of a high-stakes national expedition.

The Abruzzi Spur remains the most-used path to the summit, with approximately 75% of all climbers taking this route. It is a relentless ascent over steep snow, ice, and rock. After navigating the lower sections and establishing initial camps, climbers face House's Chimney, a vertical rock pitch that presents a significant technical challenge at altitude. Higher still looms the Black Pyramid, a menacing, 365-meter-tall buttress of dark, fractured rock and ice that requires sustained, serious technical climbing.

Above the Black Pyramid, a broad, sloping snowfield known as the Shoulder leads to the final and most notorious section of the climb: the Bottleneck. This is a narrow, steep couloir, or gully, located directly beneath a massive, 100-meter-high wall of precarious ice cliffs, known as seracs. Climbers must traverse this highly exposed section, which is less than 100 meters wide, at an altitude of over 8,200 meters. The ever-present danger is that the seracs could collapse at any moment, sweeping the entire passage with a catastrophic avalanche of ice. It is, without question, one of the most dangerous places in all of high-altitude mountaineering.

The "Savage Mountain" moniker was coined in 1953 by American climber George Bell, who, after nearly dying in an accident on the mountain, told reporters, "It's a savage mountain that tries to kill you." The name has stuck because it is tragically accurate. The technical difficulty is sustained from base to summit; unlike Everest, there are no long, gentle slopes to offer respite. The weather in the Karakoram is far more severe and less predictable than in the Nepalese Himalayas, with K2's more northerly position exposing it to colder temperatures and stronger winds. The climbing season is perilously short, often with only a few days of suitable weather for a summit push.

These objective dangers have been underscored by numerous tragedies. The summer of 1986 became known as the "Black Summer" in one of the worst disasters in mountaineering history. A series of separate accidents and a severe, prolonged storm high on the mountain resulted in the deaths of 13 climbers from multiple expeditions. On June 23, Polish climber Wanda Rutkiewicz became the first woman to summit K2, but she and the French couple Liliane and Maurice Barrard, who summited later the same day, were caught in the descent; the Barrards fell and vanished, while Rutkiewicz barely survived. In early August, a group of climbers including Briton Alan Rouse and Austrian Kurt Diemberger were trapped at the highest camp by a week-long blizzard. Exhausted, dehydrated, and out of food, several died from exposure and altitude sickness, including Rouse and his climbing partner, Julie Tullis.

Two decades later, disaster struck again at the mountain's most infamous feature. On August 1, 2008, a large piece of the ice serac above the Bottleneck collapsed. The resulting avalanche didn't directly hit many of the climbers, but it swept away the fixed ropes they relied on for a safe descent. In the chaos that followed, panic set in among the climbers stranded in the death zone in darkness. Some attempted to descend the treacherous terrain without ropes, while others waited for a rescue that would not come. Over the course of 48 hours, 11 climbers from several international expeditions perished, making it the single deadliest event in K2's history.

For decades, one great prize in mountaineering remained: the first winter ascent of K2. While all other thirteen 8,000-meter peaks had been climbed in the harshest season, K2 rebuffed all attempts. The winter conditions on the mountain are almost unimaginable, with hurricane-force winds and temperatures plummeting below minus 60 degrees Celsius. Numerous strong expeditions tried and failed, defeated by the extreme cold and ferocious jet stream winds. The challenge was considered by many to be the last great problem of Himalayan climbing.

The seemingly impossible was finally achieved on January 16, 2021. In a remarkable display of teamwork and national pride, a team of ten Nepali climbers stood on the summit together. The joint team, which included members from different commercial expeditions, paused just below the summit to wait for each other, then walked the final steps together, singing the Nepali national anthem. The successful ascent was a landmark moment, not just for conquering K2 in winter, but for the Sherpa and Nepali climbing community, who for so long had been the unsung heroes of Himalayan mountaineering. One of the team's leaders, Nirmal "Nims" Purja, completed the ascent without the use of supplemental oxygen, an astonishing feat of endurance. Their success was a triumphant chapter in the often-tragic story of the savage mountain.