Potosi from the SE.
Potosi Mt. is 20 miles SW of Las Vegas. We didn't use either of Zdon's routes and instead hiked up via a 4wd road (with a locked gate at the bottom) on the southeast section of the peak.
Snowcats were parked at various elevations. Evidently the antenna people drive up as far as they can in their 4wd and then get the rest of the distance by snowcat.
Summit antennas visible at upper left.
Looking south. Starting earlier, a dozen coats of silicon spray on our boots before the trip, and gaiters would have got us to the top.
NE to Las Vegas.