Covington Falls Petroglyphs
There are a couple of very faint petroglyphs and pictographs out at Covington Falls. I think most hikers walking the route walk right past them without noticing.
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.