Yol Valley or Yolyn AmYol Valley is a deep and narrow gorge in the mountainous region of Gobi Desert. It is wide at the entrance but gradually narrows down. It could be described as an “oasis” in the desert. Due to the steep valley walls, thick rock and lack of wind this area remains cool even in the height of summer allowing a glacier to survive. The rugged terrain of the valley makes it a popular place for trekking enthusiasts.