Triyuga (Nepali: त्रियुगा) is one of eight municipalities of Udayapur district of the Koshi Pradesh of Nepal. Gaighat is the headquarter of the municipality. At the 1991 Nepal census, it had a population of 55,291.^[1] The 2011 Nepal census counted 87,557 inhabitants.^[2] According to the 2021 Nepal census the initial population of the municipality is 104,375.^[3] It is divided into 16 wards. Triyuga Municipality was established on B.S. Chaitra 13, 2053 (26 March 1997). It was named after Triyuga River. A river which flows through the town. Triyuga is the 3rd largest municipality in Nepal and 1st largest in Koshi Pradesh in term of size (area). The total area of the municipality is 547.43 square kilometres (211.36 sq mi)^[2]

Almost all facilities are available in the town. Schools, colleges, Hospitals and clinics are available in the town. There are six police stations and armed police force in the town, and an army barrack is also situated in the city.

Triyuga municipality was established on 26 March 1997 merging 3 VDCs: e.g. Gaighat, Deuri and Bhumarashuwa. Total area of the municipality was 319.88 square kilometres (123.51 sq mi).^[4]

On 6 March 2017, following VDCs added into Triyuga municipality: Jogidaha, Saune, Khanbu and Jalpachilaune. Now total area of the municipality is 547.43 square kilometres (211.36 sq mi).

Triyuga municipality is divided into 16 wards:^[5]

Triyuga is one municipality out of four municipalities of Udayapur District. The municipality is surrounded by Mahabharat hills in north and Churey hills in south. Udayapurgadhi and Rautamai are in north of the municipality, Khotang District is in north-east and Chaudandigadhi Municipality is in east. Saptari District is in south of Triyuga Municipality.

This city is in the famous Udayapur Valley. Gaighat (गाइघाट) (other name of Triyuga) is the shadow of a historic kingdom of Sen dynasty in Udayapurgadhi (Chaudandi), this Inner Terai Valley of south-eastern Nepal has a glorious history with a bright future. Gaighat is in the plane of the Valley. Udayapur Valley is the largest valley in eastern Nepal having fabulous natural attractions such as the Triyuga river, Baruwa river flowing through the town. Koshi River is east of the city.

The total population of the municipality, as of 2011 Nepal census is 87,557 in which male comprises 41,221 and female 46,336. There are 19,484 households. 74% of people of the municipality is educated. 82% male and 66.5% female are educated.^[6]

Chetri is the largest group of caste in Triyuga municipality which comprises 24.24% of people of total population of Triyuga. The second largest group of caste is Tharu people which comprises 14.91%. Rai 12.43%, Magar 9.04%, Bahun (Hill Brahman) 7.74% comprises total population of the municipality.^[6]

Nepali language is the mostly spoken language in Triyuga, which is spoken by 55.82% of people. Tharu language is secondly most spoken language, Maithili language is third most spoken language and Magar is fourth.^[6]

Education in the town is accessible. Campuses for higher education are available at Gaighat. Triyuga Janata Multiple Campus provides undergraduate and post graduate education on management and social sciences. Baruwa Campus provides undergraduate education, management and science. Similarly Udayasi English higher secondary school provides intermediate education on science and management. There are numerous other schools for education, such as:

• 1. Himalayan Dale Academy, Bokse
• 2. Paradise Secondary school, Gaighat
• 3. Udayapur English School, Gaighat
• 4. Laligurans Secondary school, Gaighat
• 5. Canvas Secondary school, Gaighat
• 6. Sagarmatha Secondary school, Purano Gaighat
• 7. Rastriya janata higher secondary school, Bagaha
• 8. Janajyoti higher secondary school, Chuhade
• 9. Shree janata Higher Secondary School Deory
• 10. Evergreen Secondary English Boarding School
• 11. Shree Ram Janaki higher Secondary School, Motigada
• 11. B.D.M. English Boarding School, Motigada
• 13. Udayasi English Higher Secondary school, Jaljale
• 14. Baruwa Campus, Gaighat
• 15. Peace-Zone international Academy, Gaighat
• 15.Triyuga Janata Multiple Campus, Motigada^[7]
• 16.Shree Balmandir Secondary School, Bokse

Tharuhat Rangsala

Football, cricket and Cycling are the most popular sports in Gaighat. Tharuhat Rangsala with a capacity of 10,000+ spectators is the largest football stadium in the city. The Udayapur Gold Cup, is held in the stadium with National Football Clubs as well as District Clubs. There is a covered hall at Bokse, where indoor events can be organized. Other facilities in the city includes Boxing Ring, Karate Ring, Table tenniscourt, Lawn Tennis court and Badminton court.

Sagarmatha Highway (NH-16) from Kunauli Border, Saptari connects Gaighat with Bihar (India). NH-01 cross NH-16 at Kadmah-Lahan (Saptari) which connects Gaighat with all other parts of the country. NH-16 also connects Gaighat to Khotang and Solukhumbu Districts. Likewise Madan Bhandari Highway (NH-09) goes through the city which connects Dharan in the East and Sindhuli in the west. The highway is opened after the completion of chatara bridge over Koshi.

Public buses are available from Kathmandu, Biratnagar, Kakarbhitta and other cities to move to the city. Local transportation is available within the town. Many small local routes have public transport facilities. Tempos and taxis are available for rent too. Sagarmatha airport is proposed to be constructed in the city.

Communication facilities is available in the town. Internet services are provided by Nepal Telecom, Subisu, Broadlink, Worldlink. Telephone services are provided by Nepal Telecom, Ncell and United Telecommunications. Both Pstn as well as cellular phones can be used in the city.

Following banking and financial institutions provides services in the city.

• Nepal Investment Mega Bank
• NIC Asia Bank Limited
• Global IME Bank Limited
• Rastriya Banijya Bank
• Nepal Bank Limited
• Citizens Bank International Limited
• Laxmi Sunrise Bank Limited
• Agriculture Development Bank
• Himalayan Bank Limited
• Kumari Bank Limited
• Sanima Bank
• Everest Bank Limited
• Nabil Bank Limited
• Siddhartha Bank Limited
• Machhapuchchhre Bank
• Prabhu Bank Limited
• NMB Bank Limited
• Shangrila Development Bank
• Kamana Sewa Bikash Bank
• Jyoti Bikash Bank
• Muktinath Bikash Bank

Hotels and restaurants are available in Gaighat. Resorts are available near Koshi Tappu Wildlife Reserve and in town. Lodges and resorts with sufficient services are available. Hotels and lodges delivers proper hospitality to the guest in the town. Fooding and lodging are available in the hotels of the town. Some of the hotels are Gangachuli Hotel, Hotel A-one, Sital Chautari.

National daily newspapers like Kantipur, The Kathmandu Post, Annapurna post, The Himalayan Times, Nagarik, Republica, Gorkhapatra are available in early morning. Local television named G-music is broadcast via cable. To promote local cultures Triyuga has FM radio stations Radio Triyuga 104 MHz, Radio Udayapur 102 MHz and which are Community radio Stations. Radio Amurta 91.6 is a commercial fm station in Tyiyuga. Cable television service is also available. Many local newspapers are published in the town on daily, weekly basis. Some of them are Majhkharka, Triyuga post, Baruwa Times.

• A view of a street to main chowk, Gaighat Bazar from Pipal Chowk
• Triyuga higher secondary school
• Radha-Krishna Temple

• Katari
• Belaka
• Chaudandigadhi