I think the pictures might have been better if I had been there either earlier or later in the day. As it was, I was in a fairly dark canyon with very bright cliff faces up above. The HDRIs just don't look very good.
It was cool and damp at the bottom of the canyon. Every now and then a warm, dry breeze would blow through. There were lots of footprints in the sand. Dozens of people must have walked up and down that canyon since the last rain. I didn't see anybody the whole time I was there, though. I don't think I saw what makes it so popular, though. I stopped to check the time once and calculated that I couldn't get back to the truck before sunset. It was still too warm to be tromping through tall grass and brush after sunset, so I started hurrying back then. I saw some nice stuff, but I don't think I've found the big attraction yet.
My PN-40 didn't go belly-up due to lack of GPS signals, though it did seem to have a little trouble navigating in the narrow canyon. My SPOT seemed to be very confused. I'm going to have to go back earlier in the day and explore further. As it was, I think I went far enough since I'm not in very good shape right now. It was getting hard to walk by the time I got back to the truck, but I was trying to hurry and it was too dark for pictures so I wasn't stopping to rest at all. Click below to see all of the pictures.