3 hours one way
The gorge at the entrance may flood after a downpour.
River tracing boots, helmets, life jackets
The entrance is called "Butterfly Valley(蝴蝶谷)", a natural water park for the local. Fun for swimming, picnicking and BBQ. Recently visitors have significantly risen, especially on holidays. At the end of the river trace is there a waterfall with its big pool. On my way to it I saw wild boars and deer. The water is beautiful and the valley is very ideal for camping. The river trace is easy.