Great photo. I followed to your album "Silver Grotto/Shinumo Wash" looks like a great canyon to explore. I will have to put it on my hit list.
There were several tricky rappels and one scary downclimb, mid-5th class. There are other downclimbs, but only one was scary.
I have a photo from this exact spot, which was taken on a river trip. Beautiful area when the sun sets.