Took us around 7 hours in total, though we went past where most people do and played around in the pools a fair bit.
When there is lots of water apparently this river is known for having siphons.
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A perfect place to go river tracing. Tons of waterfalls and areas to practice climbing, and a near-endless supply of emerald blue pools perfect for swimming in. There are a fair number of people at the start point though we only saw one other group more than 300m up and no one after 500m or so. I should note that we went the morning after a big storm and the water was moving quite quickly in some places. Another group we saw was forced to turn back as some of their members were not comfortable going further. Fortunately, their "leader" worked with us to set some ropes up and get us and himself across the worst of it. We wanted to make it right to the end of the river, however, were blocked around 200m from the final waterfall. We went up the mountain on our left and down to the road on the other side of it and walked out. This involved quite a few scraps and a pretty steep scramble. Either be prepared for some trailless Mountian bushwacking or have enough time to double back if you hit the endpoint we have as a GPS. The trail mountain wacked our way to can be found here 22.835964, 120.653911.