If you cross over from Baidi scenic spot you can hike the whole 9.6km to the top of the Gorge. You get some really stunning viewpoints on the walk, but I didn't make it to the end, as I wanted to get the 2:30pm ferry down the gorge, which you can pay 50 yuan for at the scenic spot. This 1 hour short ferry ride is well worth the fee for stunning river level view of the gorges.