We did not do any hiking there but were on the way to Shangri La. We stopped by at the gorge and had to tackle some 500+ stairs to go all the way down to the bottom of the valley to see the millions of tons of water pounding at the rocks where there was a narrow stretch of water in the bottom of the valley. It was not easy to walk back up but it is definitely worth the while. They have "carriages" to take you down or back up at RMB 100 per person. Do go down there if you are fit to tackle 1,100 stairs!