Leading river traces regularly on my Meetup or Instagram 12 seasons a year.
You need to go through thick silver grass to get to the main river. The three small waterfalls are near the fork. There is a trail by the river on the left side(facing downstream). Nothing special after the three waterfalls. A 1-hour river trace.
First waterfall: 23.71886,121.37544 Second waterfall: 23.71878,121.375 Third waterfall: 23.71818,121.3736
The hot spring outcrops lie between 23.72413,121.37077 to 23.728852, 121.369507, and there are several really good hot spring pools.