I saw signs much like this one as I made my way down towards the confluence point. I do not make a habit of crossing fences which say not to, so I went down over the hill a short distance away from the fence. When I got to the bottom of the steep part, I found a fence with no signs which I crossed. I suspected that it was the continuation of the one with the signs that I had seen above and so I was a little surprised to find that I was still "outside" even after crossing the fence.
Location: Near 46N 116W