If you’re a peak-bagger..... The highest point of the ridge isn’t Baldy Peak itself (11,403 feet) but an unnamed area (11,420 feet) to the north. So, you may have the argument/excuse that you 'never set foot on Baldy Peak'.
Pertaining to what is V below V , see the map Page H6 > https://tinyurl.com/y9sbutkx
And a very clear, definitive map here (be certain that NAD-27 is highlighted in the "datum" heading on the right border) that shows the high-point is NOT on the rez.
More on this...
Excerpted from: http://www.surgent.net/highpoints/az/apache.html
..."A ridgepoint a few hundred yards to the northeast is slightly higher, and lies on the boundary of the Reservation, with the Mount Baldy Wilderness sharing the boundary. Thus, this peak is publicly accessible.
Recent maps, however, muddy this issue. They show the boundary to be offset a couple hundred yards to the east, placing the north ridge inside the Indian Reservation. I believe this is an error. Older maps were rendered in the NAD-27 datum, while newer maps are rendered in the WGS-84 datum. The two datums differ by a couple hundred feet in the east-west direction. I suspect the waypoints that were taken in the NAD-27 datum were replotted in the WGS-84 datum, accounting for this odd shift in the boundary.
I mention all this because I think it's an important distinction to make. This places the north ridge—the probable highpoint—within the Indian Reservation, which would then make it also publicly inaccessible. The older Mount Baldy WIlderness maps (dated about 1970) show the boundary to be exactly on the north ridge. This is common practice, to place boundary waypoints on ridgelines. Shifting the boundary to a slope seems odd. Frankly, I would suggest that you carry this older version of the map, and in the rare case someone stops you, argue your point using the map in hand. "