A pass was needed to enter the\is valley - due to a daily quota of not more than 600 in a day, as told by the locals. It could be registered online or you do it in person but don't waste your time!
This is basically a walk uphill on a single one lane tarmac, with the river running on one side and the forest on the other. We parked our car and entered the valley by foot. There were some side paths that led straight down to the running river amid the big boulders. The climb could be tough for the elderly, small toddlers and the handicapped - not recommended. Other than this, this valley was just a continuous walk up. Half way on, we were surprised to find some cars coming into the valley. Each time the cars came by, we had to wait at one side. There was no room. And we thought cars were off limits!!!
If daily passes were needed, I would have thought it must be a natural reserve or there must be a good reason for it. But to have cars entering at will, activities like rock hopping/climbing conducted by vendors who had to drive their vans to the point of entry - that made for a lot of pollution! Nothing for conservation!
We were sorely disappointed to have gone to great lengths to procure the passes to realize this valley was just like a nature walk up some hill!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.