Really short. The river was quite dry so we managed to drive up a fair bit of it. Without that still 2 hours in and out at most
falling rocks
A rope
This was a nice little spot. Sadly we didn't make it very far up. We got to a portion with a waterfall that used to have a rope to help get up that had been removed. As we didn't have one to put into its spot we had to turn around. If we had one it may be possible to continue further up this river and connect this trace with this one https://www.tracetaiwan.com/traces/81