Do not use those GPS info on the interactive map.
It is wrong!!! You will end up bothering private property, but also, you will end up in the forest and only find yourself in the wrong place!
The cave is not in the woods where the gps is. I was there, finding my way thru thick wood and ended up nowhere. The trial along Amata is a bad idea as well as lots of rocks fell down and you wont be able to hike safely. - Info is from August 2018.