This is "Cottonwood Creek", though I suspect there's rarely ever any water in it.
We enjoyed imagining how exciting it would be to watch the water arrive after a good rain!
One would not want to be right down in the bottom of the wash...

I'll quote a bit here from my journal:

Ravens flew gracefully through the canyon over our heads, the stiff feathers of
their wings whistling. Tiny lizards (were they babies?) with blunt faces that
reminded me of salamanders scurried deeper into the small dry bushes at our approach.
Black and yellow butterflies fluttered past. The light bounced off the
golden walls of the canyon so that everything in there was suffused with a glow.
Underfoot it was mostly sandy but walking was easier on the hardened red mud
and the occasional areas of bare rock. The calls of the ravens seemed a
suitable sound for such a wild and magical place.