Bipenggou Valley is locaed in the transition zone from the Sichuan Basin to the Tibet-Qinghai Plateau. the total length is 45km, 4km wide . 180 square km. altitude ：from 2050m-5666m. Climate： the average annual temperature it starts to snow in September and last till next year April. what to see in this area : varieties of plants form colorful forests in autumn ( late Sep.-early Nov) snow mountains vallys and lakes glacier arrow bamboo gorges it's a heaven for hiking lenthusiasts by car 4.3 hours . bus from Chengdu Chadianzi bus station to Lixian, then transfer from Lixian-Bipeng Valley