The valley meets the ocean towards the north with a beautiful black sand beach that is cut in two by the river. See the two houses down there too. There is a road off to my left that is gated and I believe it is also a trail. The road is narrow, impossibly steep (25% average grade), and rough.
https://bigislandhikes.com/waipio-valley

I didn't realize the guarded gate was because the road had been closed in February. A lawsuit was filed in April. Needless to say, it's very interesting and will remind you of some of what we deal with in our popular tourist/hiker areas as well https://www.civilbeat.org/2022/04/waipi ... al-action/