JimJools may well be right that Tengri Khan is the answer being sought (doing the same puzzle?) but it isn't the answer to the question put.
Nannypearce asked about mountainS = plural - Tengri Khan is one mountain. It's in the Tien Shan (or Tian Shan) range of mountains as Chris said - also known as Tangri Tagh, or Celestial Mountains.