Province: Selenge Province
Centre of sum: Orkhontuul  , 250 km located from Sukhbaatar.
Population: 3'684
Area: 2940 km2

Orkhontuul is a sum (district) of Selenge Province in northern Mongolia.  Orkhontuul soum was the center of the Jujan Empire in the 3rd century BC and AD IV-III AD. Since then, the Orkhontuul sum of Selenge aimag was the easternmost province of Ugodei province and the Amgalan sum of Tusheet Khan aimag, 1921-1931, named Bulgan shiree mountain of Bogd Khan Uul Province and Orkhontuul sum of Selenge aimag in 1931.

In the southwestern part of Selenge province:

  • 240 km from Ulaanbaatar,
  • 250 km from the province center.

It is bordered by Buregkhangai, Orkhon aimag, Tuv province, Jargalant, Zaamar and Baruun-Undur soums of Selenge province and Orkhon sum.
Nature and geography is the grass steppe in the northern steppe zone of Mongolia, as well as the forest-steppe zone, with a unique environment and ecological environment.

It is covered in dehydrated and cool regions and is subjected to a subtropical zone of lowland valleys in the soil zone.

  • Average January temperature -28 ° C
  • Average July temperature + 19 ° C