Best (and only!) guess so far. Yes, this canyon is not far south of Tooth. That's a good enough guess for me, but the answer that I was really looking for was that this particular canyon holds the "Eagles Nest" ruin as well as the "Ladder" pictograph. Not revealing any secrets here as both are well documented online with locations and tracks, as well as in some guidebooks. Also interesting on our loop with the next canyon south were two sets of cougar prints, one large and one small, in the wet sand of the wash lower down.
Take it away,
@John Morrow.