Boundary Island Petroglyphs
In a far-flung corner of Joshua Tree, there is an isolated boulder outcrop with a few dozen petroglyphs. The petroglyphs are generally abstract in design and could be of Serrano or Chemehuevi origin.
Guy has explored the deserts and mountains of the Western US for over three decades. In that time, he has found a couple of hidden and remote locations that don't see many visitors. The best way to contact him is on this site.