Koshi Province in the context of "Darjeeling district"

Kangchenjunga is the third-highest mountain in the world. Its summit lies at 8,586 m (28,169 ft) in a section of the Himalayas, the Kangchenjunga Himal, which is bounded in the west by the Tamur River, in the north by the Lhonak River and Jongsang La, and in the east by the Teesta River. It lies in the border region between Koshi Province of Nepal and Sikkim state of India, with the West and Kangbachen peaks located in Nepal's Taplejung District and the Main, Central and South peaks directly on the border.

Until 1852, Kangchenjunga was assumed to be the highest mountain in the world. However, precise calculations and meticulous measurements by the Great Trigonometrical Survey of India in 1849 showed that Mount Everest, known as Peak XV at the time, is actually higher. After allowing for further verification of all calculations, it was officially announced in 1856 that Kangchenjunga is the third-highest mountain in the world.

The Sherpa people (Standard Tibetan: ཤར་པ།, romanized: shar pa) are a Tibetan ethnic group native to the mountainous regions of Nepal, India, and the Tibetan Autonomous Region of China.Most Sherpas live in eastern Nepal: the provinces of Bagmati (mainly in the districts of Dolakha, Sindhupalchok and Rasuwa) and Koshi (mainly in the districts of Solukhumbu, Sankhuwasabha and Taplejung). Some live north of Kathmandu, in the Bigu and Helambu regions. They can also be found in Tingri County, Bhutan, and the Indian states of Sikkim and northern West Bengal (the Darjeeling and Kalimpong districts). Sherpas establish monasteries known as gompas in these regions, where they follow their local traditions. Tengboche was the first celibate monastery in Solu-Khumbu.

The Sherpa language is part of the southern branch of the Tibeto-Burman languages, mixed with eastern (Khams Tibetan) and central Tibetan dialects. This language is separate from Lhasa Tibetan, and is unintelligible to Lhasa speakers.

Sikkim (/ˈsɪkɪm/ SIK-im; Nepali: [ˈsikːim]) is a state in northeastern India. It borders Bhutan in the east, the Tibet Autonomous Region of China in the north and northeast, Koshi Province of Nepal in the west, and West Bengal in the south. Sikkim is also close to the Siliguri Corridor, which borders Bangladesh. Sikkim is the least populous and second-smallest among the Indian states. Situated in the Eastern Himalaya, Sikkim is notable for its biodiversity, including alpine and subtropical climates, as well as being a host to Kangchenjunga, the highest peak in India and third-highest on Earth. Sikkim's capital and largest city is Gangtok. Almost 35% of the state is covered by Khangchendzonga National Park – a UNESCO World Heritage Site.

The Kingdom of Sikkim was founded by the Namgyal dynasty in the 17th century. It was ruled by Buddhist priest-kings known as the Chogyal. It became a princely state of the British Indian Empire in 1890. Following Indian independence, Sikkim continued its protectorate status with the Union of India after 1947 and the Republic of India after 1950. It enjoyed the highest literacy rate and per capita income among Himalayan states. In 1973, anti-royalist riots took place in front of the Chogyal's palace. In 1975, after the Indian Army took over the city of Gangtok, a referendum was held that led to the dissolution of the monarchy and Sikkim's joining India as its 22nd state.

Maithili (/ˈmaɪtɪli/ MY-til-ee, Maithili: [ˈməi̯tʰɪliː]) is an Indo-Aryan language spoken in parts of India and Nepal. It is native to the Mithila region, which encompasses parts of the eastern Indian states of Bihar and Jharkhand as well as Nepal's Koshi and Madhesh Provinces. It is one of the 22 scheduled languages of India. It is the second most commonly spoken native Nepalese language constitutionally registered as one of the fourteen provincial official languages of Nepal.

It is spoken by 21.7 million people. Of those, 3.2 million are Nepalese speakers. The language is predominantly written in Devanagari, but the historical Tirhuta and Kaithi scripts retained some use until today.

Mithila (IAST: Mithilā), also known as Tirhut, Tirabhukti and Mithilanchal, is a geographical and cultural region of the Indian subcontinent bounded by the Mahananda River in the east, the Ganges in the south, the Gandaki River in the west and by the foothills of the Himalayas in the north. It comprises certain parts of Bihar and Jharkhand states of India and adjoining districts of the Koshi Province, Bagmati Pradesh and Madhesh Province of Nepal. The native language in Mithila is Maithili, and its speakers are referred to as Maithils.

Mithila is commonly used to refer to the Videha Kingdom, as well as to the modern-day territories that fall within the ancient boundaries of Videha. Until the 20th century, Mithila was still ruled in part by the Raj Darbhanga.

Ama Dablam is a mountain in the Eastern Himalayas range of Koshi Province, Nepal. The main peak is 6,812 metres (22,349 ft), the lower western peak is 6,170 metres (20,243 ft). The name Ama Dablam literally means 'mother's charm box' in the Sherpa language; the long ridges on each side like the arms of a mother (ama) protecting her child, and the hanging glacier thought of as the dablam, the traditional double-pendant containing pictures of the gods, worn by Sherpa women. For several days, Ama Dablam dominates the eastern sky for anyone trekking to Mount Everest Base Camp. Because of its soaring ridges and steep faces, Ama Dablam is sometimes referred as the "Matterhorn of the Himalayas". The mountain is featured on the one rupee Nepalese banknote.

Although Alfred Gregory led the first attempt on Ama Dablam in 1958 it was on 13 March 1961 that the first successful ascent was made, when Mike Gill (NZ), Barry Bishop (US), Mike Ward (UK) and Wally Romanes (NZ) ascended the Southwest Ridge. They were well-acclimatised to altitude, having wintered over at 5,800 metres (19,029 ft) near the base of the peak as part of the 1960–61 Silver Hut expedition, led by Sir Edmund Hillary.

Taplejung District (Nepali: ताप्लेजुङ जिल्ला Listen) is one of seventy-seven districts of Nepal and one of the 14 districts of Koshi Province. It is located deep in the Himalayas in Eastern Nepal with བོད to the north across the Himalayas. Taplejung is the third largest district (by area) of Nepal.

The district covers an area of 3,646 square kilometres (1,408 sq mi) and has a total population (2011 Nepal census) of 127,461. The district is surrounded by Tibet in the north, Sankhuwasabha District in the west, Tehrathum District and Panchthar District in the south and Sikkim (India) in the east. Geographically, the district is located at a latitude of 27º 06' to 27º 55'N and a longitude of 87º57' to 88°12' E.

The Sikkimese Bhutia language (Tibetan: འབྲས་ལྗོངས་སྐད་, Wylie: 'bras ljongs skad, THL: dren jong ké, Tibetan pronunciation: [ɖɛ̀n dʑòŋ ké]; 'rice valley language') is a Sino-Tibetan language spoken by the Bhutia people of the indian state of Sikkim and parts of Koshi province in eastern Nepal, and Bhutan. It is one of the official languages of Sikkim.

The Bhutia refer to their own language as Drendzongké (also spelled Drenjongké, Dranjoke, Denjongka, Denzongpeke or Denzongke) and their homeland as Drendzong (Tibetan: འབྲས་ལྗོངས་, Wylie: 'bras-ljongs, 'Rice Valley'). Up until 1975, Sikkimese was not a written language. After gaining Indian statehood, the language was introduced as a school subject in Sikkim and the written language was developed.

Bagmati Province (Nepali: बागमती प्रदेश, Bāgmatī pradēśa) is one of the seven provinces of Nepal established by the constitution of Nepal. Bagmati is Nepal's second-most populous province and fifth largest province by area. It is bordered by Tibet Autonomous Region of China to the north, Gandaki Province to the west, Koshi Province to the east, Madhesh Province and the Indian state of Bihar to the south. With Hetauda as its provincial headquarters, the province is also the home to the country's capital Kathmandu, is mostly hilly and mountainous, and hosts mountain peaks including Gaurishankar, Langtang, Jugal, and Ganesh.

Being the second most populous province of Nepal, it possesses rich cultural diversity with resident communities and castes including Thami (Thangmi) (Shneiderman, 2009, 2015; Turin, 1998), Newar, Tamang,Sherpa, Tharu, Chepang, Jirel, Brahmin, Chhetri, and more. It hosted the highest number of voters in the 2017 election for the House of Representatives and Provincial Assembly.