My first visit to this part of Angeles Crest Highway since the Bobcat Fire 2 years ago. A lot of burned trees along the trail. From Islip Saddle, the trail climbs steadily until the PCT breaks off from the summit trail. From there, it is a quick climb to the three peaks on Mount Williamson: East Williamson Peak, Mt Williamson, and Peak 8248. Great views into the desert to the north.