Udayapur (उदयपुर)

Udayapurgadhi is the historic old administrative headquarters of Udayapur district, situated on a spectacular, high hilltop at an altitude of approximately 1,100 meters. The site features the historic ruins of an ancient brick fort built by the Sen kings, who ruled the region before the Gorkha unification of Nepal. The hilltop offers stunning, panoramic views of the fertile Triyuga valley below and the majestic eastern Himalayas above. Visitors can explore the ancient defensive trenches, visit the sacred Panchawati temple, and enjoy a cool, refreshing mountain climate that contrasts beautifully with the warm plains below.

Gaighat (officially known as Triyuga Municipality) is the bustling, modern administrative headquarters and commercial capital of Udayapur district. Nestled in the fertile Triyuga Valley of the inner Terai, the town serves as a major trade, transport, and educational hub connecting the plains with the hilly districts beyond. The town features wide paved streets, commercial shopping plazas, and comfortable hotels. It is bordered by the scenic Triyuga River, which offers beautiful riverside parks, picnic spots, and walking trails. Gaighat serves as the central base camp where overland travelers arrange local transportation and permits.

The Chaudadigadhi region is an exceptionally significant archaeological and historical site located in the eastern hills of Udayapur. It contains the ruins of the historic Chaudandigadhi Fort, which served as the capital of the eastern Sen Kingdom (Chaudandi) during the 18th century AD, before its conquest. The fort area, nestled in scenic green hills, preserves ancient brick walls, defensive fortifications, and stone sculptures. The surrounding hills are highly popular for day hiking, birdwatching, and nature photography, offering travelers a fascinating journey back into the royal geopolitical history of eastern Nepal.

The Koshi/Triyuga River Landscapes represent the highly scenic natural area where the raging waters of the mighty Koshi River and the gentle Triyuga River meet. This fertile lowland valley features expansive alluvial plains, wide sandy river beaches, and dense subtropical forests that support vibrant ecosystems. The river landscapes are popular for family picnics, birdwatching, and sunset walks. The region sits adjacent to the Koshi Tappu Wildlife Reserve, offering opportunities to spot wild water buffaloes and migratory birds. Visitors can take peaceful boat rides to experience the magnificent scale of the river confluences.

The Rautamai Hills are a highly sacred and beautiful hilltop sanctuary located in northern Udayapur. The hill stands at a high altitude, hosting the revered Rautamai Temple dedicated to Goddess Rautamai, which is believed to possess divine healing and wish-fulfilling powers for true devotees. The hill is surrounded by a pristine, dense forest of oak and rhododendron, and features the beautiful Rauta Pokhari (Rauta Pond), which is the source of the Triyuga River. The viewpoint offers panoramic, close-up views of the eastern Himalayas, providing a highly tranquil, deeply spiritual natural retreat for visitors.

Katari Valley is a scenic, fertile inner-Terai valley situated in western Udayapur. The town of Katari serves as a bustling, historically significant gateway connecting the lowland plains of Siraha and Saptari directly with the hilly districts of Okhaldhunga, Khotang, and Solukhumbu along the Sagarmatha Highway. The valley features fertile agricultural farms, lush green hills, and traditional markets. Nearby highlights include the sacred Triveni Dham on the banks of the Sunkoshi River, which draws thousands of pilgrims during the Makar Sankranti festival. Katari serves as a vital transit and trading hub for mountain travelers.