Lunana

Lunana (Dzongkha: ལུ་ན་ན) is a gewog (block) in the Gasa District of northern Bhutan, widely regarded as one of the most remote inhabited places on Earth. Located at elevations between 4,000 and 5,000 metres (13,000–16,400 feet) above sea level, Lunana is a sparsely populated landscape of glacial valleys, high-altitude lakes, and permanent snowfields, hemmed in by peaks that exceed 7,000 metres along the border with Tibet (China). The region is home to approximately 700 to 900 people distributed across a handful of small settlements, the largest of which is Thanza.^[1]

Lunana's extreme remoteness — it requires a minimum of eight to ten days of trekking from the nearest road — has preserved a way of life that is almost entirely pastoral, centred on yak herding and the seasonal rhythms of the high Himalaya. The region gained international attention through the 2019 Bhutanese film Lunana: A Yak in the Classroom, directed by Pawo Choyning Dorji, which premiered at the BFI London Film Festival and was nominated for the Academy Award for Best International Feature Film at the 94th Academy Awards in 2022, depicting the challenges of education in one of the world's most isolated schools.^[2]

Lunana is also a region of significant scientific and environmental concern due to the presence of numerous glacial lakes, several of which pose a serious risk of glacial lake outburst floods (GLOFs). The warming climate has accelerated glacial retreat in the area, increasing the volume and instability of these lakes and threatening communities downstream in the Mo Chhu and Pho Chhu valleys, including the historic town of Punakha.

Geography

Lunana occupies the headwaters of the Pho Chhu (Father River), which flows southward through Gasa District to its confluence with the Mo Chhu at Punakha. The region is defined by a series of U-shaped glacial valleys carved during successive ice ages, now partially filled with moraine deposits and dotted with turquoise glacial lakes. The Table Mountain (Gangla Karchung, 6,395 m), Zongophu Gang (7,060 m), and Jejekangphu Gang (7,300 m) are among the major peaks framing the landscape.^[3]

The principal settlements include Thanza (approximately 4,100 m), Lhedi, Chozo, and Tenchey. These villages are small clusters of stone and timber houses set amid yak pastures, connected to one another by trails that cross high passes often blocked by snow for months at a time. There are no roads, no motorised vehicles, and no permanent bridges over the larger rivers. Supplies that cannot be produced locally must be carried in on foot or by pack animals over distances that take days to cover.

Climate and Environment

Lunana experiences a severe high-altitude climate with temperatures that can drop below minus 20 degrees Celsius in winter. The growing season is extremely short — roughly three to four months — limiting agriculture to small plots of turnips, radishes, and buckwheat in the lowest settlements. Snowfall is heavy and persistent from November through April, and avalanche danger is a constant concern on the higher trails.^[4]

The region lies within the Jigme Dorji National Park, Bhutan's largest protected area, which spans 4,349 square kilometres across the northern tier of the country. Lunana's ecosystems range from subalpine scrub and dwarf rhododendron at lower elevations to permanent ice and rock at the highest points. Wildlife includes blue sheep (bharal), Himalayan marmots, snow leopards, and a variety of high-altitude bird species. The area is part of a critical biological corridor connecting protected areas in Bhutan with conservation landscapes in Tibet.

Glacial Lake Outburst Flood (GLOF) Risk

Lunana contains more than 500 glacial lakes, of which several have been identified as posing a high risk of glacial lake outburst flood. A GLOF occurs when the natural moraine dam holding back a glacial lake fails, releasing a catastrophic torrent of water, rock, and debris downstream. The most dangerous lake in the Lunana region is Raphstreng Tsho, which has been the subject of intensive monitoring and mitigation efforts since the 1990s.^[5]

On 7 October 1994, a GLOF from Luggye Tsho in Lunana sent a devastating flood down the Pho Chhu valley, killing 21 people, destroying houses and farmland, and causing damage as far downstream as Punakha Dzong, more than 90 kilometres away. The 1994 flood remains the most destructive natural disaster in modern Bhutanese history and prompted the Royal Government, with support from the United Nations Development Programme (UNDP), the Austrian government, and other international partners, to undertake a major GLOF risk reduction programme.^[6]

Mitigation measures have included the manual lowering of lake levels by digging drainage channels through moraine dams — work carried out at extreme altitude by labourers and army personnel in extraordinarily difficult conditions. Early warning systems, consisting of sensor stations along the Pho Chhu that can alert downstream communities via siren, have also been installed. Despite these efforts, the ongoing retreat of Himalayan glaciers due to climate change continues to enlarge existing lakes and create new ones, making GLOF risk an enduring concern for Bhutan. The country has become an important voice in international climate negotiations, citing Lunana's vulnerability as evidence of the disproportionate impact of global warming on small, low-emission nations.^[7]

People and Culture

The inhabitants of Lunana, sometimes referred to as Lunaps, share cultural and linguistic affinities with the Layap people to the west, though their dialect and some customs differ. Like the Layap, the Lunaps are semi-nomadic yak herders who move their animals between seasonal pastures and supplement their income through the collection of cordyceps and, increasingly, through involvement in the trekking industry. The community practises Vajrayana Buddhism, and several small temples and chortens dot the landscape.^[8]

Life in Lunana is defined by extreme self-reliance. With no road access, medical emergencies often require evacuation by helicopter — a service that, while provided by the Royal Bhutan Army, depends on weather conditions that frequently prevent flying. The government operates a basic school in Thanza, depicted in Lunana: A Yak in the Classroom, which follows a young teacher posted to the village against his wishes. Teacher retention is a persistent challenge, as the isolation and harsh conditions make it difficult to attract and keep qualified staff. Solar panels provide limited electricity to some households, and a small community radio relay offers intermittent communication with the outside world.

Trekking

Lunana is the centrepiece of the Snowman Trek, widely considered one of the most difficult long-distance treks in the world. Trekkers typically reach Lunana from Laya after crossing a series of high passes above 5,000 metres, arriving in Thanza approximately two weeks into the journey. The stark beauty of the glacial landscape, the turquoise lakes, and the sense of profound isolation draw a small but dedicated number of trekkers each year, though completion rates for the full Snowman Trek remain low due to the physical demands and the ever-present risk of early snowfall closing the high passes.^[9]

References

1. "Lunana Gewog." Wikipedia.
2. "Lunana: A Yak in the Classroom." Wikipedia.
3. "Lunana Gewog." Wikipedia.
4. "Addressing Risks of Climate-Induced GLOF." UNDP Bhutan.
5. "Addressing Risks of Climate-Induced GLOF." UNDP Bhutan.
6. "GLOF Risk in Bhutan." PreventionWeb.
7. "Adaptation and Resilience." UNFCCC.
8. "Lunana Gewog." Wikipedia.
9. "Snowman Trek." Tourism Council of Bhutan.