Indian Cave aka Hidden Cave somewhere in Joshua Tree National Park

Indian Cave, also known as Hidden Cave, was first discovered in 1975 by U.S. Federal archeologists. The National Park system has kept the cave's location undisclosed and it is not mentioned in any of their literature.
It is sometimes mentioned in various forms on the internet, none of which provide the location.
On Feb 8th, 2022 Syndi and I set out to find it. This was our 4th attempt. Armed with a book, some Google Earth images and print outs from online sources we were determined to find it this time.
Indian Cave is a small "room" under a large boulder that was used by native Americans in prehistoric times starting many hundreds of years ago. The walls and ceiling of the cave are inscribed with many pictoglyphs painted with native dyes. These images have survived due to the protection provided by the enclosed cave. The cave is large enough for two people inside sitting. To enter one must wiggle belly first (recommended) through a narrow opening. BOLO for bugs and critters.
Please do not contact me for the coordinates as I will not provide them.
A big part of the adventure for us was in locating the cave. No Ez-Pzy!
This cave is fragile and needs the protection of being kept secret and away from people. My photographs here are of the insides only. I have refrained from showing any images of the outside areas to preserve the security of the location.

[@naokih7304]

Hello John,
I have been searching for this cave for couple years now and been going all around hidden valley and barker dam area. I have visited several of the other pictograph locations around the wonderland of rocks and barker dam area. If you could reply to me privately and give me any information on where I should be looking for this.. It would be much appreciated!

[@Yiroirp]

It took a lot of effort for us to locate it also. The satisfaction came from putting together clues from the internet and using Jim Mattern's book (that is the clue). Other than that I have sworn myself to secrecy on this location. I have been contacted twice from the NPS about the need to keep this under wraps.

[@Peregrine_1]

@@Yiroirp I would also ask for coordinates as I've done other hidden caves in JT but I can understand and respect your stance on keeping the secret, a secret. Can't have those influencers destroy the place

[@naokih7304]

Yes. Same here. I have done it for various locations and have all of the Death Valley jim books. I just would like any other leads as every internet blog I’ve seen does not even point you to a direction/location/area/what to look for other than that it’s in a place that is well trafficked. I haven’t been able to locate it for several month with those clues and might be all around west joshua tree with no sign of finding it. I know a lot of this is word of mouth. Please message me privately and then I can potentially help you out as well if there are other places you wanted to see. Thanks

[@Yiroirp]

I think I would have found the cave faster without the "Help" of Jim Mattern's book. That book and the way I read it lead me astray. That said, his book was the inspiration for us to locate the cave. I did visit a vast number of rock climbing web pages with a variety of results.

[@naokih7304]

Yes, I have still not been able to locate it despite all the trips out there. I have even discussed with park rangers and found that they didn’t even know some of the locations I already visited. Hope someone can at least point to a general location to search. I have info on other pictograph sites.