People climb Mount Everest for reasons that range from deeply personal to surprisingly practical, but the common thread is a desire to test the boundaries of what they’re capable of. George Mallory, who died attempting the summit in 1924, described the pull as “the struggle of life itself upward and forever upward,” something he believed humans have an inherent need to respond to. Nearly a century later, more than 4,300 people have reached the top, and the motivations have only grown more varied.
The Psychology of Extreme Altitude
Climbers are often dismissed as adrenaline junkies, but research into the personality traits of Everest mountaineers paints a more complex picture. Studies examining biological attributes, risk-seeking attitudes, and personality factors have found that the drive to attempt extreme climbs isn’t simply about chasing a thrill. It’s closer to what psychologists call self-actualization: the need to pursue the hardest version of something you care about and find out who you are in the process.
For many climbers, the mountain represents an unambiguous challenge in a world full of ambiguous ones. There’s no negotiating with altitude, no politics in oxygen deprivation. You either make it or you don’t. That clarity is part of the appeal. Others are drawn by grief, career transitions, or the desire to prove something after illness or injury. The summit becomes a symbol for whatever personal obstacle they’re trying to overcome.
What the Mountain Does to Your Body
At 8,850 meters, the air pressure on Everest’s summit is roughly one-third of what it is at sea level. The proportion of oxygen in the air doesn’t change, but the density of the air drops so dramatically that each breath delivers far less oxygen to your lungs. The first barometric reading ever taken on the summit, in 1981, came in at about 253 mmHg, compared to 760 mmHg at sea level. That pressure fluctuates with weather and season, effectively making the summit feel anywhere from 8,700 to 9,000 meters tall depending on the day.
Above about 8,000 meters, known as the death zone, your body deteriorates faster than it can recover. Cognition suffers noticeably. Early high-altitude research documented climbers producing illegible handwriting and losing the ability to write sequences of numbers. In 1947, a Royal Air Force wing commander compared climbing Everest without supplemental oxygen to attempting a dangerous technical climb while drunk. A person who managed it, he wrote, would need to be “physically and mentally exceptional and also remarkably lucky.” That comparison holds up: modern climbers in the death zone report confusion, impaired judgment, and hallucinations.
This is, paradoxically, part of the draw. The mountain strips away everything comfortable and familiar about how your mind and body work. Climbers describe the experience of functioning at the edge of human capability as transformative in a way that nothing at lower altitudes replicates.
What It Takes to Prepare
Most people need at least a year of dedicated training before attempting Everest, building on an already solid fitness base for the final six to nine months. The physical benchmarks are specific and demanding. Climbers should be able to gain 4,000 feet of elevation in two to three hours while carrying a 50 to 60 pound pack, roughly 1,500 vertical feet per hour. Training starts with shorter hikes carrying 30 to 40 pounds, adding three to five pounds per outing until 55 pounds feels manageable, then increasing distance and elevation.
About a month before departure, climbers should be comfortable doing back-to-back training days: hauling 60 pounds up 3,000 feet on day one, then going out again the next day with a lighter pack over greater distance. Cardiovascular conditioning requires four to six aerobic sessions per week, each at least an hour of sustained effort, before the specific climb training even begins. Previous experience above 20,000 feet is considered essential, not just for fitness but for learning how your body handles extreme cold, thin air, and technical terrain with a heavy pack.
The Cost of a Summit Attempt
Climbing Everest has never been cheap, and it’s getting more expensive. Nepal recently raised permit fees for the first time in nearly a decade, increasing the peak-season cost from $11,000 to $15,000 per climber, a 36 percent jump that takes effect in September. Off-peak permits rose proportionally: $7,500 for the autumn season and $3,750 for winter.
The permit is just the entry ticket. A fully guided expedition from the Nepal side typically runs $30,000 to $100,000 or more, depending on the level of support. That covers logistics, supplemental oxygen, food, tents, and critically, the Sherpa team that makes the whole operation possible. Some climbers spend additional money on pre-expedition acclimatization using hypobaric tents, which simulate altitude at home and reduce the adjustment period on the mountain.
The Sherpas Who Make It Possible
The term “Sherpa” originally refers to an ethnic group from Nepal’s eastern highlands, though it’s now widely used as a job title for any high-altitude guide in the Himalayas. Sherpas fix ropes, carry supplies, set up camps, and guide clients through the most dangerous sections of the route. They routinely spend far more time in the death zone than the climbers they support, often making multiple trips to stock higher camps before a client passes through even once.
Working as a guide or porter on Everest offers a rare economic opportunity in one of the world’s poorest regions, but the toll is unlike any other service profession. Sherpa guides frequently find themselves caught between traditional values of service, the pressure to maintain a strong personal reputation (which determines future hiring), and life-or-death decisions at extreme altitude where client satisfaction can be prioritized over personal safety. In a recent tragedy, a Sherpa guide named Nawang spent hours trying to convince a client to use supplemental oxygen, ultimately losing his own life in the effort. Stories like his are pushing a growing conversation about the ethics of commercial Everest expeditions and the risks borne disproportionately by the people who make them possible.
How Success Rates Have Changed
The first full-scale attempts on Everest began in 1922. It took 31 years before anyone reached the summit, in 1953. During the early “expeditionary” period from the 1950s through the 1960s, massive teams pooled their efforts to put just a handful of climbers on top. Today the calculus is completely different. Summit success rates have essentially doubled over the past 30 years: roughly two-thirds of climbers now reach the summit, compared to one-third in the earlier period. Between 2006 and 2019 alone, more than 3,600 climbers made attempts.
What hasn’t changed is the death rate. Despite better gear, better weather forecasting, and more experienced Sherpa support, about 4 percent of successful summit attempts are still accompanied by fatalities. The most common causes of death are altitude sickness, exhaustion, falls, avalanches, and hypothermia. Better technology has allowed more people to reach the top, but the mountain’s fundamental hazards remain unchanged.
The Environmental Price
Everest Base Camp has waste management systems in place, but above that point, there is essentially nothing. Climbers at higher camps dig holes in the snow to defecate or drop waste into crevasses. Decades of expeditions have left behind oxygen bottles, torn tents, fixed ropes, and human waste across the upper mountain. Nepal has introduced rules requiring climbers to bring back a minimum amount of waste, but enforcement at extreme altitude is nearly impossible. For a growing number of climbers, this environmental toll complicates the moral math of the endeavor, adding a layer of responsibility to what was once seen as a purely personal achievement.
Why They Keep Going
The simplest answer is that Everest occupies a unique space in the human imagination. It is the highest point on Earth, a fact that gives it a symbolic weight no other mountain can match. But the deeper answer is that the climb demands a kind of total commitment, physical, financial, psychological, that most people never experience in ordinary life. The months of training, the weeks of acclimatization, the hours in the death zone where every step requires conscious effort: these compress the full range of human endurance into a single project with an unmistakable finish line.
Some climb for legacy, some for ego, some to honor someone they’ve lost. Some are professional athletes pushing the boundaries of what the human body can do without supplemental oxygen. Others are weekend hikers with deep pockets and a dream. What unites them is the belief that standing on that particular patch of snow, at that particular altitude, will mean something that nothing else in their lives can replicate.