Was not where I had circled on the map, and I relocated twice and looked into adjacent re-entrants. What I didn't do was go up the hill, which is where the control was.
After 3 or 4 minutes, I just went on.....
I spent quite a bit more than 3-4 minutes, then just got disgusted with the whole thing and opted for the trail run. I've heard from a number of others that it was farther up the hill too - I guess I just didn't hunt far enough from the circle (or relocate from that direction)
At least I feel better knowing it wasn't poor navigation on my part - the previous 5 controls had gone well - cautiously slow, but well executed.