Leading river traces regularly on my Meetup or Instagram 12 seasons a year.
The waterfall at the end of the trace is Butterfly Gorge Waterfall(蝴蝶谷瀑布). The water is cool and pristine. There are quite a few bouldering routes along the rivers and a few pools.
Dry most of time in a year. The waterfall only has decent water when there are showers. Good place for boudering.
The destination is the famous Kuhuatan (苦花潭)24.543001,121.019188. 1. Shortcut (24.542640, 121.020780): The trailhead is in the village. Cars are not allowed to get in the village on weekends. 2. From near Qifenzui Waterfall(24.54543,121.02779). Intermediate river tracing route. Beautiful pools and quite a few climb-ups along the way. The water is ch ... illing.