It is shortcut for going to South of Xinjiang from the north or to the north from the south on Ancient Silk Road. It is just 6-day trekking,but on they way you may see various landform, wild animals,acient ruins. It is the top grade classical route in Xinjiang.
Now it had existed for hundreds of years, it was abondoned since the highway going through Tienshan Mountain near Urumqi was built in last 1950s.
There are some high mountains like Xuelian Feng, Tomur Peak,Pobeda,Khan Tengry peak,Koxkar peak are in this area.
You may get more in the net, I think.