In 2017, we ventured out to the Eastern Mojave to finally visit Aiken's Arch and its pictographs and petroglyphs. The pictographs inside of this arch which formed from a collapsed lava tube are some of the oldest, if not the oldest, in the East Mojave, dated to 9,300 BP. The pictographs are mainly in red ochre and they depict a variety of figures, mostly abstract, but a few humans are mixed in there as well.
The basalt walls of Black Tank Wash, on the way to the arch, are also covered in hundreds of petroglyphs that stretch off in both directions from the arch.
Don't let my understatement fool you, this is a fantastic place. Please respect it. It is well worth the visit. Please follow Rock Art Etiquette while you are there.