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Manaslu

Manaslu is an and the eighth-highest mountain in the world, rising to 8,163 meters (26,781 feet) above in the Mansiri Himal range of the . Located in west-central Nepal's , approximately 40 miles (64 kilometers) east of I and 73 miles (118 kilometers) northwest of , it is the highest peak in its district and is revered locally as the "Mountain of the Spirit" due to its dramatic, isolated presence. First summited on May 9, 1956, by climber Toshio Imanishi and Gyalzen Norbu via the North Face, Manaslu marked the third conquered after and Everest. The mountain's northeast serves as the standard route, offering a moderately angled and ascent that has seen over 3,750 successful s as of 2025, though it carries risks from and a narrow, corniced . With a fatality-to- ratio of approximately 2.4% as of 2025, Manaslu is considered one of the more accessible yet hazardous eight-thousanders, often used as preparation for expeditions, and approximately 50% of climbers reach the top without supplemental oxygen. Notable tragedies include a 1972 that killed 15 climbers and a 2012 event claiming 11 lives, underscoring its unpredictable weather and terrain, though the 2025 season saw over 600 s with no fatalities. Encompassing Manaslu is the Manaslu Conservation Area, established in 1998 and spanning 1,663 square kilometers across Gorkha and districts, which protects diverse ecosystems from subtropical forests to alpine meadows and harbors 33 mammal species—including snow leopards, , and blue sheep—along with 110 bird species and 11 butterfly species. This protected zone promotes through the Manaslu Conservation Area Project, involving local communities in preservation and maintenance, while the surrounding Manaslu Circuit trek attracts adventurers to its remote valleys and high passes like Larkya La at 5,106 meters.

Overview

Location and Elevation

Manaslu is situated on the border between the Gorkha and Districts of west-central , within the Mansiri Himal subrange of the Nepalese . The mountain's summit is located at precise coordinates of 28°32′58″N 84°33′43″E. At an elevation of 8,163 meters (26,781 feet) above sea level, Manaslu ranks as the eighth-highest mountain in the world. Manaslu exhibits a of 3,092 meters, indicating its significant independent rise from the surrounding terrain. Its line parent mountain is , the sixth-highest peak globally, which underscores Manaslu's position within the broader Himalayan prominence hierarchy. In regional context, Manaslu lies approximately 64 kilometers east of Annapurna I, the tenth-highest mountain at 8,091 meters, and is positioned eastward from the massif, the seventh-highest at 8,167 meters, highlighting its central role among Nepal's cluster of eight-thousanders.

Name Etymology and Significance

The name "Manaslu" derives from the word manasa, which translates to "" or "," and is commonly interpreted as "Mountain of the " due to its profound cultural resonance. This etymology underscores the peak's symbolic depth, evoking notions of inner wisdom and ethereal presence in Himalayan traditions. In local dialects, Manaslu is known as "Kutang" among speakers, a term originating from the word tang meaning "flat place," which refers to the mountain's broad summit plateau. This older nomenclature highlights the geographical features observed by indigenous communities long before modern . Manaslu holds sacred status in Tibetan Buddhism, where it is revered as the abode of protective deities such as Jomo, a believed to safeguard the surrounding valleys and their inhabitants. This spiritual association draws pilgrims to the region, who undertake journeys to offer prayers and seek blessings, viewing the mountain as a manifestation of divine energy intertwined with the landscape. The name Manaslu reflects its remote location in Nepal's borderlands, which limited early access and exploration until the mid-20th century. This designation reflects not only linguistic roots but also the awe inspired by its untamed, spiritually charged aura.

Geography

Topography and Geology

Manaslu forms part of the Greater Himalayan Sequence within the Himalayan orogen, resulting from the ongoing collision between the and Eurasian plates that initiated around 50 million years ago during the Eocene. This tectonic convergence has driven extensive crustal shortening of approximately 1400 km and the uplift of the , with the Himalayan range emerging as a consequence of faulting and metamorphic processes. The mountain's core consists of high-grade metamorphic rocks, predominantly and derived from to protoliths, intruded by Miocene leucogranites such as the prominent Manaslu granite complex. This granite, emplaced episodically between 24 and 19 million years ago at depths ranging from 9 to 21 km, reflects of the crustal rocks during the intensified phase of Himalayan orogenesis. The of Manaslu is characterized by stark contrasts in profiles, with presenting an exceptionally steep rise exceeding 3,000 meters from its base in the to the , forming a formidable glacial wall prone to . In contrast, the south slopes descend more gradually into the deeply incised of the Budhi Gandaki River, which carves a narrow gorge through sharp ridges and creates a rugged, V-shaped terrain flanked by steep walls. This asymmetry arises from the underlying structures and , with the Budhi Gandaki's incision enhancing the prominence of the southern approach while the northern flank remains largely unglaciated and exposed. The surrounding landforms include extensive ridgelines and subsidiary peaks that contribute to the massif's isolation within the Mansiri Himal. Manaslu's glacial systems are integral to its topographic evolution, featuring multiple valley glaciers that radiate from the summit, including the expansive Manaslu Glacier spanning about 15 km². These glaciers, which have retreated significantly since the , dam moraine-bound lakes such as Birendra Lake at 3,691 meters , influencing regional by supplying meltwater to the upper Budhi Gandaki River basin. This contribution supports downstream river flows across a catchment of over 5,000 km², though the systems are vulnerable to instability from the mountain's steep gradients. Positioned along the active in central , Manaslu lies within a high-seismicity zone driven by the Indian plate's northward beneath at a rate of about 45 mm per year. This tectonic setting has resulted in recurrent moderate to large earthquakes, including historical events such as the 1505 Lo Mangthang earthquake (Mw 8.2–8.8), the 1833 Nepal earthquake (Mw 7.5–7.9), the 1934 Bihar-Nepal earthquake (Mw 8.0–8.5), and the 2015 Gorkha earthquake (Mw 7.8), which ruptured a 150 km segment and triggered widespread landslides affecting in the region. Ongoing convergence continues to pose risks to the mountain's structural integrity, with aftershocks illuminating fault geometries in the hanging wall above the thrust.

Climate and Glaciers

The Manaslu massif lies within the and nival climate zones of the central Himalaya, characterized by steep temperature gradients with altitude and pronounced influences from the south. At base camp elevations around 4,800 m, average temperatures typically range from -20°C in winter to 10°C during summer months, with extreme lows below -30°C possible at higher altitudes due to . Seasonal patterns are dominated by the South Asian , which shapes and stability across the region. Winter ( to February) features heavy snowfall accumulation, providing favorable conditions for winter ascents with stable , though daytime temperatures rarely exceed 0°C. The period (June to September) brings intense rainfall and , often causing slope instability and limiting access, while spring (March to May) and autumn (September to November) offer clearer skies and milder conditions ideal for exploration. The glaciers of Manaslu, primarily of the summer-accumulation type, are integral to the region's and have shown significant retreat amid rising temperatures. Key examples include the South Manaslu Glacier on the southern flank and the Manaslu Glacier (also called Punhyen Glacier) on the north, the latter feeding Birendra Lake at 3,691 m. Across the Manaslu region, glacier area has decreased by 78.5 km² (12.9%) from 1970 to 2019, at an average rate of 1.6 km² per year, with terminus retreats averaging 20-30 m annually for many outlets due to balances. Microclimates differ markedly between faces, influenced by and regional air flows. The northern face, in the rain shadow of the main Himalayan barrier, is drier with stronger katabatic winds descending from the , which can scour snow and aid route drying but increase exposure risks. In contrast, the southern face receives heavier precipitation, fostering thicker snow layers and slightly milder temperatures, though this heightens potential during wet seasons.

Major Peaks and Features

The Manaslu massif, dominated by its namesake peak rising to 8,163 meters, forms the core of the Mansiri Himal subrange in north-central . This summit, known for its steep, pyramidal shape, is flanked by prominent subsidiary ridges and glaciers that contribute to its dramatic profile. To the west lies Himalchuli, the second-highest peak in the massif at 7,893 meters, creating a formidable western barrier with its sharp, ice-covered faces. East of Manaslu stands Ngadi Chuli at 7,871 meters, a rugged summit that extends the eastern flank and connects to outliers of the adjacent range, including peaks like Paldor at 5,896 meters. These nearby peaks, along with Shringi Himal, enclose the central valley systems and enhance the massif's isolation. Key features include the Larkya La pass at 5,106 meters, a high col between the and the main Budhi Gandaki valley, offering access across the northern rim of the massif. The Tsum Valley to the north features deep gorges carved by the Siyar Khola river, with narrow, terraced canyons supporting remote settlements amid steep walls. Extensive moraines, such as those associated with the , form hummocky terrains and ice-cored in the upper valleys, remnants of past glacial advances. The Mansiri Himal spans approximately 60 kilometers east-west, bounded by the Marsyangdi River to the west, which isolates it from the massif, and extending toward the in the east. This compact extent concentrates high-relief topography within a relatively narrow corridor of the Greater Himalaya.

Ecology

Flora

The Manaslu region, encompassing the Manaslu Conservation Area in central , hosts a diverse array of vegetation zones influenced by its steep altitudinal gradient from subtropical lowlands to high and nival belts. Below 2,000 meters, subtropical forests dominate, featuring broadleaf species such as oaks (Quercus spp.) and rhododendrons (), which thrive in the monsoon-fed humid conditions of the lower slopes. Between 3,000 and 4,500 meters, meadows prevail, characterized by grasses like Kobresia nepalensis and a variety of herbs including primulas and potentillas, adapted to cooler temperatures and shorter growing seasons. Above 5,000 meters, the landscape becomes largely barren, with sparse snow-resistant shrubs such as dwarf rhododendrons (Rhododendron anthopogon) and junipers (Juniperus spp.) clinging to rocky outcrops in the nival zone near the snow line. The region's flora encompasses approximately 2,000 plant species across 11 forest types and 19 dominant vegetation forms, reflecting its position as a biodiversity hotspot in the Himalayas. Notable among these are endemic and medicinal plants, including the Himalayan poppy (Meconopsis manasluensis), a striking scarlet flower restricted to high-altitude meadows in the Manaslu area, and yarsagumba (Ophiocordyceps sinensis), a valued fungus-hosting herb found in alpine cushions above 4,000 meters. Over 50 species serve medicinal purposes for local communities, underscoring the ecological and cultural value of this diversity. Vegetation distribution is closely tied to altitude and seasonal patterns, with lower zones exhibiting monsoon-dependent growth cycles that support lush forests during the wet summer months, while higher elevations feature resilient shrubs and perennials capable of enduring heavy snowfall and frost. However, this faces significant threats from by livestock, which degrades meadows and reduces regeneration, and , which is shifting treelines upward and altering patterns, potentially leading to loss for sensitive .

Fauna

The Manaslu region, encompassing diverse altitudes from subtropical forests to alpine meadows, supports 33 species of mammals, many of which play key roles as apex predators, herbivores, and prey in the ecosystem. Snow leopards (Panthera uncia), elusive apex predators, inhabit the high-altitude rocky terrains above 3,000 meters, preying primarily on blue sheep and Himalayan ibex to regulate herbivore populations. A 2024 camera-trap survey estimated approximately 15 snow leopards in the Manaslu Conservation Area, highlighting their low density of about 1.5 individuals per 100 km². Red pandas (Ailurus fulgens), arboreal herbivores dependent on bamboo understory for foraging, occupy mid-elevation temperate forests between 2,500 and 4,000 meters, contributing to seed dispersal and forest regeneration. Himalayan tahrs (Hemitragus jemlahicus), agile ungulates grazing on alpine grasses and shrubs, form herds in steep cliffs and meadows above 2,500 meters, serving as primary prey for carnivores like snow leopards. Musk deer (Moschus chrysogaster), solitary browsers feeding on lichens and leaves in dense undergrowth, inhabit forested slopes up to 3,500 meters, where males produce musk pods used in traditional scents, though populations remain unquantified due to their secretive nature. Avian diversity in Manaslu exceeds 110 , with adapting to varied habitats from river valleys to snowfields, facilitating , distribution, and control. The (Lophophorus impejanus), Nepal's national known for its iridescent plumage, forages on berries, , and in forests between 2,000 and 3,500 meters, often spotted in small groups during breeding seasons. Bearded vultures (Gypaetus barbatus), large with wingspans up to 2.8 meters, soar over high passes and cliffs above 4,000 meters, specializing in bone consumption to recycle nutrients in the . Reptiles and are confined to lower elevations below 3,000 meters due to the harsh alpine conditions, with only three reptile recorded, primarily in warmer, vegetated zones. The Himalayan (), a venomous serpent reaching lengths of up to 86 cm, ambushes small mammals and birds in rocky grasslands and forests from 1,500 to 4,900 meters, though sightings in Manaslu are rare and limited to mid-altitudes. , including 11 butterfly such as the spangled satyr, thrive in floral-rich meadows, aiding of . Many Manaslu exhibit seasonal patterns driven by altitude and food availability, with herbivores like Himalayan tahrs descending to lower valleys in winter for milder temperatures and emergent vegetation, while birds such as flycatchers and warblers migrate through the region in autumn, using it as a corridor between Himalayan ranges. Snow leopards track prey movements, shifting elevations from high ridges in summer to valleys in winter to follow blue sheep herds.

Human Aspects

Ethnic Groups and Culture

The Manaslu region is home to several indigenous ethnic groups, primarily the Nubri and Tsum in the upper valleys, who are ethnically and practice as herders and valley dwellers, while the Gurung dominate the lower elevations as farmers, and the serve as transhumant pastoralists near the Tibetan border. These groups trace their origins to migrations from centuries ago, fostering a deeply intertwined with Himalayan Tibetan traditions. Cultural practices among the Nubri and Tsum include fraternal polyandry, a traditional marriage system where brothers share a wife to preserve family land and resources, though it is transitioning due to modern socio-economic influences. Mani walls—long stone structures inscribed with Buddhist mantras like "Om Mani Padme Hum"—dot the trails and villages, serving as sites for prayer and circumambulation to accumulate merit. Festivals such as Losar, the Tibetan New Year, are celebrated with traditional dances, feasts, and rituals that reinforce community bonds and Buddhist devotion. Livelihoods revolve around subsistence activities adapted to the high-altitude environment, including yak herding for milk, , and transport, barley and potato farming on terraced fields, and historical salt and wool trade across the border with . The population in the core Nubri and Tsum areas is estimated at around 5,000, with Nubri comprising approximately 2,500 residents and Tsum about 2,500; as of the 2011 census, Tsum had about 1,810 residents, while Nubri estimates range from 2,000 to 9,000 as of 2015, influenced by tourism and migration. They speak distinct such as Nubri, Tsumba, and related dialects that reflect their Tibetan linguistic heritage. The sacred status of Manaslu, revered as a in local lore, permeates these communities' spiritual worldview.

Settlements and Religious Sites

The Manaslu region is home to several key settlements that serve as cultural and logistical hubs for local communities, primarily inhabited by ethnic groups of descent such as the Nubri and Tsumba people. Samagaun, located at approximately 3,530 meters in the Nubri Valley, stands as the largest and most central village, acting as a primary base for those in the upper Manaslu area with its cluster of stone houses, teahouses, and agricultural fields supporting and cultivation. Further down the Budhi , Jagat at 1,340 meters functions as an entry point to the region, featuring terraced fields and traditional Gurung-influenced architecture, while Deng, at 1,860 meters, represents a transitional settlement with its mix of lowland and highland influences, including bamboo groves and small monasteries. The Tsum Valley, a remote northern extension, remained a prohibited area for foreigners until , preserving its isolation and allowing villages like those in Tsum to maintain ancient customs with minimal external influence. Religious sites dot the landscape, underscoring the region's deep Buddhist heritage tied to traditions. Mu Gompa, situated in the upper Tsum Valley at around 3,700 meters, is one of the most isolated monasteries, established in 1936 by Drukpa as a meditation center housing a small community of monks; the adjacent Rachen Gompa, also founded in 1936, serves as a nunnery with around 36 nuns as of 2024. Near the Manaslu base camp area, Pungen Gompa (also known as Pungyen Gompa) at approximately 4,000 meters offers a serene vantage point with panoramic views of the peak, serving as a key site for and reflection amid its surrounding prayer flags and mani stones. Along the trails connecting these settlements, numerous chortens—stupas symbolizing —line the paths, particularly in villages like Samagaun and Samdo, where they mark sacred passages and encourage for merit accumulation. The architecture of these gompas and settlements is ingeniously adapted to the harsh high-altitude environment, featuring sturdy stone construction to withstand heavy snow and winds, often with flat roofs weighted by additional stones for stability. Interiors boast vibrant paintings—scroll-like artworks depicting deities and mandalas—painted on cloth and framed in ornate settings, alongside murals and gilded statues that illuminate Buddhist teachings. Historically, many of these sites, including settlements like Deng and Samagaun, originated as trade posts along ancient salt routes linking to , facilitating the exchange of salt, wool, and grains across the from at least the onward, which also spread Buddhist influences through passing traders and pilgrims.

Mountaineering

Early Exploration and Attempts

The first recorded Western exploration of Manaslu occurred in 1950, when British mountaineer H. W. Tilman led a small expedition through the region following an unsuccessful attempt on . Tilman's team, consisting of five members including scientists and a doctor, approached from the Marsyandi Valley and obtained the first photographs of the mountain, noting its imposing north and west faces but identifying no immediate viable climbing route due to the steep terrain and limited access. This expedition marked the initial foreign incursion into the area, as had only recently opened its borders to outsiders after centuries of isolation under the Rana regime, which had restricted entry to prevent foreign influence and protect strategic Himalayan frontiers near . Local beliefs further complicated early efforts, with residents of nearby Sama village viewing Manaslu as a sacred abode of spirits—its name deriving from the word "manasa," meaning intellect or spirit—leading to superstitions that climbing the peak would anger protective deities and bring calamity. These cultural taboos, rooted in Buddhist traditions prevalent in the region, deterred outsiders and even prompted active resistance against expeditions perceived as profane. The mountain's mystical allure, often described in local lore as a dwelling of mountain spirits, reinforced this reluctance until diplomatic interventions by the Nepalese government helped mitigate tensions in later years. In 1952, the Japanese Alpine Club, sponsored by the Mainichi Press, dispatched a reconnaissance party led by Dr. Kinji Imanishi to assess potential routes. The team explored the west face, deeming it too sheer, before shifting to the north side via the Dudh Khola valley and reaching the Manaslu Glacier at approximately 17,400 feet (5,300 meters), where they established that the northeast ridge offered the most feasible approach but required further preparation. No summit attempt was made, as the focus remained on mapping access and logistics in the remote, logistically challenging terrain. The first serious climbing attempt followed in 1953, led by Y. Mita with a team of 15 Japanese climbers approaching from the Buri Gandaki Valley. They established a base camp at 12,600 feet (3,840 meters) and advanced camps up to 24,600 feet (7,500 meters) on the northeast ridge, with an assault party reaching 25,425 feet (7,750 meters)—about 1,230 feet (375 meters) below the summit—before turning back due to extreme exhaustion, high winds, and the absence of supplemental oxygen. This effort highlighted the mountain's technical difficulties and harsh weather, setting the stage for subsequent tries. A expedition under Y. Hotta faced immediate setbacks from local opposition, as Sama villagers blockaded the route citing the mountain's sanctity and fears of spiritual retribution, forcing the team to redirect to the nearby without attempting Manaslu. This incident underscored the cultural barriers to exploration, requiring negotiations with local authorities to proceed in future years. Preparations intensified in with a post-monsoon advance party led by Ohara, Hashimoto, and Murayama, who resolved ongoing disputes with Sama villagers through government mediation and scouted logistics for a full . The team's efforts focused on route confirmation and supply lines along the northeast face, reaching preparatory altitudes but halting short of a push to build on prior data. These efforts laid critical groundwork amid persistent and access challenges.

Key Ascents and Milestones

The of Manaslu was achieved on May 9, 1956, by climber Toshio Imanishi and Gyalzen Norbu via , marking a significant milestone in Himalayan as the fifth 8,000 m peak to be summited. Two days later, fellow expedition members Kiichiro Kato and Minoru Higeta made a second ascent of the peak via the same route. A landmark in women's occurred on May 4, 1974, when the first all-female team to summit an 8,000 m peak—a expedition led by Kyoko Sato—reached Manaslu's summit, with Naoko Nakaseko, Mieko Mori, and Masako Uchida comprising the summit party. The first winter ascent took place on January 12, 1984, accomplished by Polish climbers and Ryszard Gajewski without supplemental oxygen, via the normal northeast ridge route; this success came amid tragedy for their expedition, as several members perished in avalanches during the attempt. Notable achievements in the 1990s included the first American ascent by Charlie Mace in 1997, a solo effort via the standard northeast face route that completed his quest to climb all 14 eight-thousanders. By the , Manaslu had recorded around 100 successful ascents overall, though with approximately 20 fatalities, underscoring the peak's reputation for high risk due to its avalanche-prone slopes.

Recent Expeditions and Records

In the , Manaslu experienced a surge in commercial expeditions, transforming it from a relatively obscure 8,000er into a more popular objective for guided climbs, with teams increasingly utilizing fixed ropes and logistical support along the standard Northeast Ridge route. This period also marked a rise in oxygen-free ascents, as advancing techniques and climber experience encouraged more attempts without supplemental oxygen, though exact numbers remain limited due to varying records. A notable milestone came in 2011 when Indian mountaineer Arjun Vajpai, aged 18, became the youngest person to summit Manaslu on October 4, reaching the top at 10 a.m. via the standard route. The 2010s saw sustained growth in climbing activity, with over 200 successful summits recorded in peak seasons alone, reflecting Manaslu's growing appeal amid improved and commercial operations. In 2021, Qatari mountaineer Sheikha Asma Al Thani achieved a historic ascent on September 27, becoming the first Qatari woman—and first Arab woman—to summit without supplemental oxygen, raising the Qatari flag at the top. The 2020s brought both triumphs and tragedies to Manaslu expeditions. In 2022, American ski mountaineer summited on September 26 before triggering a small during her ski descent, leading to her death at age 49 as she was swept off a cliff. The following year, on January 6, 2023, Spanish alpinist Alex Txikon and six Sherpas completed a rare winter ascent—the first since 1984—without oxygen, reaching the summit at 9:30 a.m. after enduring extreme cold and high winds. By 2024, the mountain's total fatalities reached 90, underscoring its persistent dangers despite technological advances. In 2025, the Himalaya Summit Club expedition achieved a perfect 100% summit success rate on , with all five clients—Jordanian climber Ahamed Al-Sarayrah and four nationals (Steven, Said, David, and Lea)—reaching the top between 8:30 a.m. and 11:30 a.m., supported by a team of guides including Sujan Gurung. The autumn 2025 season overall produced over 600 summits across multiple teams, contributing to Manaslu's cumulative total of approximately 3,900 successful ascents by late 2025, with a fatality rate of around 2.3%—higher than Mount Everest's (no fatalities reported in the 2025 season).

Climbing Routes

The standard climbing route on Manaslu follows the northeast face, originally pioneered by a expedition in , and remains the most commonly used path for summit attempts due to its relatively straightforward and slopes compared to other faces. This route begins at base camp, established at approximately 4,800 meters near Sama Gaon in the Samdo Valley, which requires a 7- to 10-day approach trek from the trailhead at Arughat along the Budhi valley. From base camp, climbers ascend through a series of progressively higher camps: Camp 1 at around 5,700 meters on a plateau after navigating initial and ; Camp 2 at 6,400 meters amid crevassed ; Camp 3 at 6,800 meters below a rocky ; and Camp 4 at 7,450 meters on a steep leading to the push. The route features moderate slopes averaging 30-40 degrees in the lower sections, steepening to 50-55 degrees on and near the upper camps, with fixed ropes essential for securing the path against falls and wind exposure. Alternative routes offer greater technical challenges and are attempted far less frequently. The southwest face, first ascended via a variant of the south ridge by a expedition in 1980 that reached high on the line before turning back, involves sustained mixed climbing on rock bands and walls up to 60 degrees, with loose rock and avalanche-prone gullies making it one of the more demanding options. The west face, rarely climbed due to its complexity, presents a of vertical , mixed terrain, and seracs requiring advanced skills and route-finding, with only a handful of successful ascents recorded since early explorations in the . Essential equipment for any route on Manaslu includes , ice axes, and harnesses for navigation on the lower glaciers, where probing and roped travel are critical to avoid hidden gaps. Fixed ropes are deployed by expedition teams across steep sections from Camp 1 upward to facilitate ascents and descents, particularly on the 50-55 degree slopes above 6,000 meters. Supplemental oxygen is standard for most climbers above 7,000 meters to mitigate the effects of extreme altitude on the final push from Camp 4, typically using 4-5 liters per minute flow rates via masks connected to portable bottles.

Risks and Challenges

Natural Hazards

Manaslu's is particularly prone to due to unstable cornices and seracs that frequently collapse, posing significant risks to climbers on the standard northeast . These formations, exacerbated by the mountain's steep slopes and heavy , can trigger massive slides without warning, especially during periods of unstable weather. In September 2022, an originating between Camps 3 and 4 swept through the area near Camp 4 at approximately 7,300 meters, injuring 12 climbers, including several Sherpas, and highlighting the ongoing danger in this zone. Extreme weather conditions further compound the hazards on Manaslu, with sudden whiteouts, high winds reaching speeds of over 100 km/h, and extensive crevasse fields that challenge navigation and stability above 6,000 meters. These winds, often peaking in the upper sections of the route, can delay expeditions for days and increase the likelihood of falls into hidden crevasses concealed by bridges. Climatic factors such as rapid fluctuations and heavy snowfall contribute to these conditions, making precise timing essential for safe passage. Additional risks include during summer months, when rains loosen debris on lower slopes, and during rare winter ascents, where sub-zero temperatures and prolonged exposure amplify cold-related threats. To mitigate these dangers, climbers rely on careful route selection to bypass known paths and zones, alongside advanced using and on-site monitoring to predict high-risk windows.

Incident Statistics

As of November 2025, Mount Manaslu has recorded approximately 89 fatalities among climbers attempting its summits, out of over 3,500 successful ascents (exact figures vary by source), yielding a fatality of about 2.5%. account for the majority of these deaths, comprising roughly 50% of cases, followed by falls and exhaustion at about 30%, with other causes including and exposure making up the remainder; these patterns align with broader Himalayan mountaineering statistics where cause over half of fatalities. Manaslu ranks among the deadlier eight-thousanders, with a historical fatality ratio of approximately one death per 10 successful ascents, though recent data shows a lower rate of about 1:37 due to improved safety measures and more summits. Fatalities are distributed nearly evenly between seasons, with 46 deaths in and 42 in autumn out of the total recorded through , reflecting the mountain's consistent risks year-round despite autumn's popularity for its relatively stable weather. According to (updated June 2025), no fatalities on the main peak were reported in 2025. Notable clusters of deaths occurred in the during early exploratory expeditions following the , when multiple fatalities highlighted the peak's technical challenges and avalanche proneness. In 2022, a major avalanche near Camp 4 killed one climber and injured 12 others. Separately, on the same day, renowned ski mountaineer died after falling approximately 1,800 meters while descending the summit on skis. Overall trends show an increase in incidents correlated with the of Manaslu expeditions since the early , as higher numbers of climbers—often in large guided groups—have led to crowding on routes and heightened exposure to objective hazards like . In the Manaslu region (but not on the main peak), an on Panbari Himal in late October 2025 claimed two lives, including climbers Stefano Farronato and Alessandro Caputo, underscoring ongoing regional risks.

Verification Controversies

Verification controversies surrounding Manaslu ascents stem primarily from the mountain's challenging topography, which features a broad, snow-covered plateau-like area leading to a fore-summit and a true summit separated by a precarious, corniced that poses significant risks to unroped climbers. This configuration has led to numerous false summit claims, where climbers stop at the fore-summit (approximately 8,125 meters) or the col before the ridge, mistaking it for the , especially in poor or heavy conditions that obscure the true pinnacle about 3-6 meters higher. Prior to the widespread adoption of GPS technology in the , verification relied heavily on subjective accounts, making disputes common; for instance, early ascents in the and 1980s, including several expeditions, described varying summit features—such as a rocky tower in the 1956 versus a snowy dome in later reports—fueling debates over whether those teams reached the actual top or a nearby high point. In 2016, analysis revealed that only 15 out of 175 claimed summits up to that point were confirmed as true summits, highlighting the scale of these historical inaccuracies. Modern verification methods have evolved to address these ambiguities, incorporating photographic evidence, GPS tracks, and detailed witness logs submitted to authoritative bodies like the Himalayan Database, which maintains expedition records and distinguishes between "main summit" successes (reaching the true top or within a few meters) and "fore-summit" claims. Independent experts, such as those at 8000ers.com, further scrutinize historical and contemporary claims by cross-referencing photos against topographic models, as demonstrated in a 2019 detailed analysis that clarified Manaslu's summit ridge and retroactively validated or invalidated dozens of ascents based on visual and positional data. GPS data, now standard in post-2000 expeditions, provides precise coordinates to confirm proximity to the true summit (8,163 meters), while witness corroboration from teammates or guides helps resolve discrepancies in logs; however, inconsistencies persist when teams fail to submit full documentation, leading to provisional acceptances by Nepalese authorities. Ethical concerns in Manaslu mountaineering often arise from commercial pressures that incentivize inflated success reports and underreporting of incidents to protect expedition operators' reputations and future bookings. For example, the rush to claim s amid large guided groups has led to accusations of teams turning around short of the true but logging it as a success to meet client expectations, particularly on the popular northeast ridge route where fixed ropes and crowds amplify the temptation to prioritize numbers over accuracy. Unreported deaths or turnarounds have also surfaced in critiques of commercial operations, as seen following the 2012 that killed 11 climbers, where some operators allegedly downplayed risks or continued pushes despite warnings to avoid financial losses from aborted trips. Recent cases underscore ongoing validation challenges, such as the January 6, 2023, winter ascent by Spanish climber Alex Txikon and a team of six , which was rigorously verified through GPS tracks and photos confirming the true summit without supplemental oxygen for Txikon himself, marking only the fourth confirmed winter ascent of Manaslu. Debates on oxygen use transparency continue, with critics arguing that inconsistent disclosure in team reports—where some members use it while others do not—complicates record authenticity and ethical assessments, as evidenced in post-expedition analyses questioning mixed-oxygen claims from 2021-2023 seasons. These issues have prompted calls for stricter pre-submission audits by bodies like to ensure transparency in an era of increasing commercialization.

Trekking and Tourism

The Manaslu Circuit is the primary trekking route around Mount Manaslu, forming a 177-kilometer loop that typically takes 14 to 18 days to complete, starting from Arughat or nearby Soti Khola and ending in Besisahar, while crossing the high Larkya La Pass at 5,106 meters. This path winds through the Manaslu Conservation Area, offering trekkers a remote Himalayan experience with gradual ascents through subtropical forests, meadows, and glacial valleys. An optional extension to the Tsum Valley adds 7 to 10 days as a side trip from the main circuit, branching off near Philim and focusing on cultural immersion among Tibetan-influenced communities, ancient monasteries like Mu Gompa, and hidden valleys sacred to locals. This detour emphasizes spiritual sites and traditional lifestyles rather than high-altitude challenges, providing a contrast to the circuit's physical demands. Classified as a teahouse trek, the Manaslu Circuit involves staying in lodges along the route and requires a total elevation gain of approximately 40,000 feet, making it moderately strenuous for fit hikers with prior trekking experience. The optimal seasons are (March to May) and autumn (September to November), when stable enhances visibility and reduces risks from snow or monsoons. Key highlights include panoramic views of Mount Manaslu and its surrounding peaks from vantage points like Samagaon, as well as the crossing of Birendra Lake, a turquoise glacial tarn named after Nepal's late king, where trekkers navigate fields amid dramatic scenery. These elements combine natural splendor with cultural encounters, such as interactions with Gurung and communities, underscoring the route's appeal for immersive adventure.

Permits and Logistics

Accessing the Manaslu region requires specific permits due to its status as a restricted area, regulated by the Department of Immigration to preserve the environment and cultural integrity. The primary permit is the Manaslu Restricted Area Permit (), which costs USD 100 per person for the first week during the peak from to , with an additional USD 15 per day thereafter; off- rates (December to August) are USD 75 per week plus USD 10 per extra day. Additionally, the Manaslu Conservation Area Permit (MCAP) is mandatory at USD per person, regardless of or duration, to support conservation efforts in the area. The Conservation Area Permit (ACAP) is also required for the trek's final segment from approximately Dharapani to Besisahar, costing USD per person regardless of or duration. For trekkers extending to the Tsum Valley, an extra permit is required at USD 40 per week from to (USD 7 per additional day) or USD 30 per week off- (USD 5 per extra day). These permits must be obtained in through a licensed trekking , and solo trekking is prohibited—groups of at least two with a guide are required for approval. Logistics for reaching and navigating Manaslu begin with transportation from to Arughat, the traditional trailhead, via a 6-7 hour bus ride covering about 130 kilometers along the , though road conditions can vary with weather and landslides. From Arughat, the trek proceeds on foot, and hiring a licensed guide is mandatory for the restricted area to ensure safety, route compliance, and permit validity, while porters are highly recommended to carry gear up to 20 kg per person, costing around USD 22-25 per day. Accommodation options include teahouses—basic lodges offering shared rooms, meals, and hot drinks for USD 5-15 per night—or with tents for more flexibility in remote sections, though teahouses predominate along the main circuit for convenience and lower logistical demands. The optimal trekking seasons are (March to May) and autumn (September to November), when stable weather and clear views prevail, though the region imposes informal capacity controls through permit requirements and group mandates to prevent overcrowding and . Helicopter evacuations are a common contingency for medical emergencies like , facilitated by services from bases in nearby valleys, with costs often covered by up to USD 5,000-10,000 per rescue. Overall costs for a standard 12-16 day Manaslu trek range from USD 1,000 to 1,500 per person, encompassing permits, guide, accommodation, meals, and transport, varying by group size and inclusions.

Conservation and Development

Protected Areas

The Manaslu Conservation Area () spans 1,663 square kilometers in Nepal's Gorkha and Districts and was established on December 28, 1998, by the to preserve the region's unique Himalayan ecosystems. Managed by the National Trust for Nature Conservation (NTNC) under an integrated conservation and development program, the MCA encompasses diverse habitats from subtropical forests at around 600 meters to alpine zones exceeding 8,000 meters, including the slopes of Mount Manaslu. This protected area supports a rich array of flora and fauna, such as snow leopards and Himalayan blue sheep, while integrating local community involvement in conservation efforts. The primary objectives of the MCA focus on biodiversity protection, particularly for endangered species like the snow leopard, through ecosystem preservation and community-based anti-poaching initiatives. NTNC's management emphasizes sustainable natural resource use to mitigate threats such as habitat loss and wildlife trafficking, while enhancing local capacities for environmentally responsible practices. These efforts align with broader goals of maintaining ecological balance in one of Nepal's key trans-Himalayan landscapes. Buffer zones within the , including portions of the Tsum and Nubri valleys, allow for regulated sustainable resource utilization by local communities, such as controlled grazing and collection, to balance with livelihoods. These zones extend the protected area's influence into adjacent human-inhabited areas, promoting that reduces pressure on core habitats. Key achievements include increased forest cover in high-altitude regions due to targeted conservation measures, contributing to reduced deforestation rates compared to surrounding unprotected areas. Additionally, NTNC-led wildlife monitoring programs, such as camera trap surveys in the Central Snow Leopard Landscape, have enhanced data collection on species populations and supported anti-poaching patrols involving local stakeholders. Recent initiatives as of 2025 include an agreement with NABU for fostering human-snow leopard coexistence and a Nepal-China snow leopard knowledge workshop in 2024, advancing protection for this endangered species.

Infrastructure Projects

The Manaslu Conservation Area Project (MCAP), initiated in 1998 by the National Trust for Nature Conservation (NTNC), has driven post-1990s efforts in the Gorkha and Nubri regions through an integrated conservation and approach, focusing on community infrastructure to support local livelihoods. Early initiatives under the 1997–2001 Manaslu Development Project established basic facilities, including field offices in Philim and Sirdibas, a liaison office in Gorkha Bazaar, and tourist check posts in Jagat and Samagaun, improving administrative access and monitoring. These efforts extended to enhancing education and health services, with NGOs like Community Action Nepal supporting the construction and upkeep of schools and health posts in remote Nubri villages to address historical neglect in healthcare and schooling. Road development has transformed accessibility, with construction reaching Soti Khola by the , shifting the Manaslu trek's starting point and facilitating easier transport of goods and services to isolated communities in Gorkha and Nubri. sustainability has been bolstered by eco-lodge promotions and trail maintenance, including NTNC-led work on approximately 25 km of trails with railings, signboards, and bridges at high-risk sites, helping to manage environmental impacts from over 10,000 annual trekkers as of while generating revenue for local . The Budhi Gandaki River holds significant potential, exemplified by the planned 1,200 MW Budhi Gandaki on the Gorkha-Dhading , which could provide electricity to remote areas and stimulate , with construction expected to begin in the fiscal year 2025/26 following recent cost revisions to USD 2.77 billion and ongoing financing efforts, though implementation has faced significant delays. The 2015 Gorkha earthquake severely damaged infrastructure in northern Gorkha and Nubri, prompting reconstruction of over 1,300 schools and 80 health facilities nationwide, including targeted efforts in Manaslu where local offices oversaw rebuilding six schools and health posts with earthquake-resistant designs. Challenges persist in balancing rapid growth—such as road expansion and influx—with , as increased access raises risks of , resource strain, and human-wildlife conflicts in the fragile Himalayan ecosystem. In the , initiatives have included installations benefiting 658 households in the Manaslu area for reliable off-grid power, alongside homestay training programs for over 200 operators to promote and income for ethnic communities.

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