There is a pervasive belief that The Pandava brothers went for a trans-Himalayan pilgrimage up to the Yakshdesha, also known popularly as Kailasha-Manasarovara region or Swarga(ultimate place of the Kailashapati Mahadeva and other gods and goddesses.). The question relating to the connection of Panchapandava’s activities in the Kaushiki River Valley Civilization and the Tarai of Easern Nepal is very important for the tracing of spiritual circuit concerning Mahabharata. The Kaushiki region of Nepal used to be one of the most important peaceful and popular regions for high meditation (tapobhumi) for sages, scholars and yogis and hermits even prior to the battle of Mahabharata. Among the the great spiritual pilgrimage route to connecting the tran-Himalyan part of Bhotta-desha with the intention of ultimate reaching to Kailasa-Manasarovara was the Kaushiki River Valleys. The Terai or the plain part of the Kaushiki region was one of the highly referred areas of the Mahabharata era. The Morang, Jhapa and Sunsari of the political map of Nepal are the places of Mahabharata activities.
Upper Arun and Varun via the route connected by the Kaushiki River Valley Kingdom, Varahkshetra.via sacred and beautiful mountain valleys and passes of Nepal, including sacred rivers of Nepal and the Cultural geography of Mahabharata--the sacred rivers of the Vedic Sanatani-s (Hindus) which originate in the Nepal Himalaya,--the source of spiritual pilgrimage—Kaushiki or Koshi (Varun and Arun), Gandaki/Narayani (Vaisnav name -Bhagwatdharma and Bhagawatpurana-Krishna and Balarama), Damodar Himal, Damodarakunda, Muktikshetra and Salagrami, Karnali (Ghaghara River System) and Yakshadesha or Yakshaloka, Kirata Kimpurusha and the people known as Nepa, connection with Kailash, Gurla and Mandhata mountains in the Western Himalaya. The Swargarohanaparva and the stories relating to difficult spiritual journey done by the Pandavas in order to return to Swarga
It is important that even the connection of the story of Badarinath, Rong-yul or Mana Village and the destination Basudhara concerning the trail of Pandava brothers is connected with the popular trail of the Upper Karnali Valley of Nepal and the place called Darchula, Khocher and Taglakot or Purang.