Long before European surveyors mapped the Himalayas, indigenous populations revered the mountain under local names. In Tibetan and among the Sherpa people of the Khumbu region, the peak is known as Chomolungma (or Qomolangma), commonly translated as "Goddess Mother of the World" or "Holy Mother". Early Chinese cartographers recorded this Tibetan name in 1717 during surveys commissioned by the Qing dynasty, and the peak appeared on the French geographer Jean-Baptiste Bourguignon d'Anville's Asian atlas in 1733.¹¹ In Nepal, the historian Baburam Acharya published an essay in the late 1930s highlighting the local name Sagarmatha, meaning "Forehead in the Sky" or "Head of the Earth Touching the Heaven," which the Nepalese government officially adopted in 1956.¹²¹³

Western identification of the mountain's stature resulted from the Great Trigonometrical Survey of India, an imperial mapping project initiated by the British East India Company in 1802. Because the Kingdom of Nepal and Tibet were closed to foreign travellers at the time, British surveyors observed the Himalayan peaks from the plains of northern India, referring to the unmapped mountain first as "Peak B" and after 1849 as "Peak XV". In 1852, the Bengali mathematician and surveyor Radhanath Sikdar, working alongside survey teams including Nepali corporal Tej Bir Budhathoki, used trigonometric calculations from observations taken miles away to determine that Peak XV was higher than Kangchenjunga, which had previously been considered the world's tallest mountain.

In 1856, Surveyor General Andrew Waugh officially announced the calculation that Peak XV stood at 29,002 feet (8,840 meters)—a figure reached after surveyors added an arbitrary two feet to their exact calculation of 29,000 feet to avoid the impression that the number was merely a rough estimate. Claiming that the closure of Nepal and Tibet prevented him from verifying a single universal local name, Waugh proposed naming the mountain after his predecessor, Sir George Everest. Although George Everest objected on the grounds that Indian and Himalayan landmarks should retain their native names and noted that his surname (pronounced /ˈiːvrɪst/) could not be easily written in Hindi, the Royal Geographical Society officially adopted the name Mount Everest in 1865.

Subsequent surveys refined the mountain's official elevation. An Indian survey in 1955 established a height of 8,848 meters (29,029 feet), a standard used internationally for over six decades. Disagreements later arose between Chinese surveyors, who measured the rock height at 8,844.43 meters in 2005, and Nepalese authorities, who included the summit snowpack.¹⁴ To resolve the discrepancy, Nepal and China conducted a joint satellite and ground-penetrating radar survey, announcing an agreed official height of 8,848.86 meters (29,031.7 feet) in December 2020.¹⁵

Mount Everest sits at roughly 27°59′ North latitude and 86°55′ East longitude on the crest of the Great Himalayas, straddling the Solukhumbu District of Koshi Province, Nepal, to the south and Tingri County in the Tibet Autonomous Region of China to the north. The peak is shaped like a three-sided pyramid consisting of three major faces: the North Face rising above the Rongbuk Valley in Tibet, the Southwest Face rising above the Western Cwm in Nepal, and the remote Kangshung Face to the east in Tibet.¹⁶¹⁷¹⁸ Ridge lines connect Everest directly to neighboring peaks within the massif, including Lhotse (8,516 meters, the world's fourth-highest peak) via the South Col, Nuptse (7,861 meters) to the southwest, and Changtse (7,543 meters) across the North Col.¹⁹

The geological formation of Mount Everest began roughly 50 to 55 million years ago when the Indian tectonic plate, having broken away from the supercontinent Pangaea and drifted northward across the ancient Tethys Ocean, collided with the Eurasian plate.²⁰ As the continental crust buckled and thrust upward, marine sediments from the floor of the Tethys Ocean were folded and elevated thousands of meters into the atmosphere.

Geologists divide the rock of the Everest massif into three stacked formations separated by low-angle detachment faults belonging to the South Tibetan Detachment System.²¹²² The base of the mountain up to roughly 7,000 meters consists of the Rongbuk Formation, composed of high-grade metamorphic schist and gneiss intruded by light-colored leucogranite sills and dikes. Above the Lhotse detachment fault, from 7,000 to 8,600 meters, lies the North Col Formation, made of Cambrian-era metamorphosed mudstone, shale, phyllite, and schist. Its upper section between 8,200 and 8,600 meters forms the "Yellow Band," a prominent stratum of yellowish-brown marble rich in diopside and epidote minerals containing recrystallized fragments of marine crinoids.²³ Separated from the Yellow Band by the Qomolangma detachment fault, the summit pyramid above 8,600 meters comprises the Qomolangma Formation: pale grey Ordovician limestone, dolostone, and siltstone dating back 450 to 500 million years that preserve fossils of ancient trilobites, crinoids, and conodonts.

Mount Everest remains geologically active, shifting northeastward while continuing to rise at a net rate of several millimeters per year. In October 2024, a study published in Nature Geoscience by researchers from the China University of Geosciences and University College London demonstrated that Everest's anomalous growth rate compared to neighboring peaks is partially driven by isostatic rebound.²⁴ Approximately 89,000 years ago, the nearby Arun River was captured by the Kosi River network about 75 kilometers (47 miles) from the mountain; the intensified river erosion carved away vast quantities of gorge rock, lightening the regional crust and allowing the mantle below to push Everest upward by an estimated additional two millimeters per year.

The upper reaches of Mount Everest extend into the lower stratosphere and are frequently buffeted by the subtropical jet stream, producing extreme meteorological conditions. At the summit, winter temperatures can plunge as low as -60 °C (-76 °F), while even in the warmest summer months, average summit temperatures remain between -36 °C and -19 °C (-33 °F to -2 °F).²⁵ Hurricane-force winds over the peak can reach speeds of up to 322 kilometers per hour (200 miles per hour). Above 8,000 meters—a region mountaineers term the "Death Zone"—atmospheric pressure is roughly one-third that at sea level, providing insufficient oxygen for human life to be sustained indefinitely without supplemental gas. Expeditions rely on brief weather windows in May, prior to the summer Indian monsoon, and occasionally in early autumn after the monsoon subsides, when the jet stream shifts northward and wind speeds temporarily drop.²⁶²⁷

Surrounding the ice and rock of the high massif are protected ecological zones that encompass diverse alpine and subalpine habitats. On the southern side, Nepal established Sagarmatha National Park in 1976, covering 1,148 square kilometers (443 square miles) with a 275-square-kilometer buffer zone added in 2002; UNESCO designated the park a World Heritage Site in 1979.²⁸ Ranging in elevation from 2,845 meters at Monjo to the summit, the park transitions from temperate forests of blue pine, oak, and rhododendron to alpine zones of dwarf shrubs, creeping juniper, mosses, and lichens. On the northern slope, China administers the Qomolangma National Nature Preserve, spanning 33,819 square kilometers across four Tibetan counties.

These reserves harbor rare high-altitude wildlife adapted to thin air and cold temperatures.²⁹ Lower and middle elevations support populations of the endangered snow leopard, red panda, Himalayan black bear, musk deer, and Himalayan tahr. Over 200 bird species inhabit the surrounding valleys and cliffs, including the Himalayan griffon vulture, golden eagle, and colorful pheasants such as the Himalayan monal.³⁰

Although elite mountaineers have pioneered roughly 18 distinct routes up Mount Everest, including technical lines on the Southwest Face and Kangshung Face, more than 95 percent of all ascents occur on two standard corridors: the South Col route in Nepal and the Northeast Ridge route in Tibet.

The South Col (Southeast Ridge) route begins with a multi-day trek through the Khumbu Valley to South Base Camp at 5,364 meters (17,598 feet) on the Khumbu Glacier. Immediately above Base Camp lies the Khumbu Icefall, a rapidly shifting cascade of towering ice blocks (seracs) and deep crevasses that specialized Sherpa teams ("Icefall Doctors") bridge each spring with aluminum ladders and fixed ropes.³⁹ Above the Icefall, climbers pass Camp I to enter the Western Cwm, a flat, sun-baked glacial valley leading to Camp II at roughly 6,500 meters. From there, the route ascends the steep, icy Lhotse Face to Camp III (approx. 7,160 meters) and crosses the Yellow Band and Geneva Spur to reach Camp IV on the windswept South Col at approximately 8,000 meters. The final summit push climbs via the Balcony and the South Summit before traversing an exposed cornice ridge and the rocky pitch known as the Hillary Step to the true summit.⁴⁰

The Northeast Ridge route in Tibet offers a different logistical and technical profile. Because a paved road reaches North Base Camp near the Rongbuk Glacier at roughly 5,150 meters, expeditions can transport supplies by vehicle rather than relying on airlifts and foot porters, and climbers avoid the objective hazard of the Khumbu Icefall. From Base Camp, teams trek with yak transport up the East Rongbuk Glacier to Advanced Base Camp at 6,400 meters beneath the North Col. Climbers then ascend snow and ice slopes to Camp I on the North Col (7,000 meters), continue up the exposed, windy ridge to Camp II (approx. 7,700 meters) and Camp III (approx. 8,300 meters), and traverse the high rock bands of the Northeast Ridge. This final section requires surmounting three steep limestone cliffs known as the First, Second, and Third Steps—with the Second Step at 8,610 meters historically navigated via a metal ladder bolted into the rock by Chinese mountaineers in 1975—before ascending the final snow pyramid. Following the COVID-19 pandemic in 2020, Chinese authorities frequently restricted or closed foreign access to the North Ridge,including during the 2026 season, channeling virtually all commercial traffic onto the Nepalese side.

The rapid growth of commercial mountaineering and trekking has created severe environmental and safety pressures on Mount Everest.⁴¹ During narrow fair-weather windows in May, hundreds of climbers and guides converge on the upper Southeast Ridge simultaneously, creating dangerous bottlenecks at the Balcony, the South Summit, and the Hillary Step. Viral photographs of long queues in 2019 and a high toll of 17 climber deaths in the 2023 season sparked international debate over climber inexperience, overcrowding, and the ethics of commercial guiding in the Death Zone.

Accumulated waste and climate change have further degraded the mountain's high camps and glaciers.⁴² Decades of expeditions left tons of discarded oxygen cylinders, torn tents, food packaging, human excrement, and the frozen bodies of deceased climbers at the South Col and along climbing routes. Simultaneously, rising global temperatures have accelerated the thinning and melting of the Khumbu Glacier. Because South Base Camp sits directly on moving glacial ice and rock debris that is destabilized by summer meltwater, Nepal's Ministry of Culture, Tourism and Civil Aviation proposed feasibility studies in late 2025 to potentially relocate Base Camp to lower, firmer ground.

To address these problems while managing an industry that generated more than $7.19 million in climbing permit fees alone in 2026, Nepalese authorities enacted sweeping regulatory reforms between 2024 and 2026.⁴³ Effective September 1, 2025, the government increased the royalty fee for a foreign spring climbing permit on the southern route from $11,000 to $15,000 per person. Under the amended Mountain Expedition Regulation Act and legislative proposals introduced in 2025 and 2026, Nepal mandated stricter health checks, tracking chips for climbers, a requirement that all high-altitude guides be Nepali citizens, and rules requiring permit applicants to demonstrate prior experience climbing a 7,000-meter peak in Nepal.

In March 2026, the Sagarmatha Pollution Control Committee (SPCC) enforced tighter environmental mandates for Everest, Lhotse, and Nuptse. Foreign climbers were required to pay a mandatory $600 Khumbu Icefall route fee, sort Base Camp garbage into seven distinct categories, and carry down at least 8 kilograms of trash from above Base Camp, including a mandatory 2 kilograms from above Camp II for both climbers and high-altitude staff. Building on rules first introduced in 2024, climbers must use official biodegradable waste bags for human excrement above Base Camp and submit complete equipment inventories at the conclusion of each expedition to ensure high camps are cleared.