Warning: For anyone who tries to locate the cave and possibly do a little exploring of your own, be aware that "you are being covertly monitored". If you are lucky enough to be able to visit the cave, "be on your best behavior".
August 1994: While doing a flyover of a wilderness study area, the BLM discovered the cave pictured below. Upon entering the cave they saw numerous artifacts including basketry, cordage, Atlatl darts, and at least one bundle of dart shafts -- no small discovery, that's for sure. Fast forward to 1997: On May 1st, some conscientious hikers reported what they thought was an unknown "cave" to the Las Vegas BLM office. Somehow the concept of people going into the cave came as a surprise to the Las Vegas BLM office and by May 7th, they were visiting the cave and what did they discover but vehicle tracks and human footprints. On June 24th a BLM task force started recording the cave only to find out that many of the originally-reported artifacts from 1994 were missing, among those were baskets, dart shafts, and one entire bundle of shafts. Just think, if it had not been for the hikers "doing the right thing", by the time the Las Vegas BLM would have gotten back to the cave... well, who knows.
One good thing that came from of all this was that all of the known remaining artifacts were removed and are now stored somewhere to never again be seen (that's a whole other pet peeve of mine). The artifacts that were salvaged were carbon dated from 1400 BP to 3700 BP.
The opening to the cave is through a sink hole with the entrance to the cave being about 30' across. After you get to the entrance, you have go down a steep talus slope another 75' before you reach the bottom, which is the start of the main chamber. The cave is a large cavity approximately 500' long, 90' at the widest point, with heights varying to over 30' in the main chamber. Much of the cave floor is jumbled rock and very tricky to navigate.
My first trip to the cave was in October 2011, and my last trip was in February 2012. I hope to make another trip in the near future.