Héngduànshān

The Hengduan Mountains rise in steep ridges around the upper Anning and Dadu valleys. Rivers have cut deep channels through the ranges, leaving narrow corridors between high slopes. The Anning begins on the southern side of the Gongga mountain country and flows south towards the Yalong, while the Dadu drains the mountains farther north. Forests cover many slopes, with colder, more exposed ground on the heights.