Yes, (not all, southern mountains generally accessed by southern trailheads)
but that is a hard number to get at. I suspect a very small number.
for example, my friend Paul Garry just climbed a bunch of peaks out of the
Miter Basin area, Pickering, Joe Devel, etc. they had not been climbed,
according to the registers, in 3-5 years, each. Even Guyot hardly gets climbed.
I would think, with the exception of Russell, there are only a few climbers a
year on those peaks, at most.
but that's just a guess.