Just a short slot canyon we found by default when trying to get to another one. I guess we probably were the first through, at least in modern times, though the ancient visitors might of found a way through . They did have a habit of exploring an area and leaving rock art. We didn't find any in this canyon, but nearby Mantle Cave has some ruins.
"In fact, I think you should add your body fat to the rating of the climb, to get a true measure of your inner climber. So climbing a 5.7 with 22% body fat is way harder than climbing a 5.14 with 3% body fat."