8,199 ft / 2,499 m


1,568 ft / 477 m


50 summits

Top climbing months

July   23%

September  15%

August   15%

"I didn't really expect to be hiking this weekend, as there was a strong chance of rain and thunderstorms. But by the time I went to bed on Friday night, the chances decreased somewhat for the Mt. Williamson area, and I thought that if I got an early start, I'd beat the storms. I started hiking at 6:25am from the parking area midway between Eagles Roost and Islip Saddle where the PCT crosses Angeles Crest Highway (as described in HPS route 2). The ridge line between the PCT and Mt Williamson was very windy. I'd planned to continue north / northwest from Mt. Williamson along Pleasant View Ridge," - HikerMark, Jul 18, 2015
"A nice hike up the PCT to the summit. One of the best views north of any mountains in the San Gabriels. Spotted a dust devil down in the Mojave along with some great cloud formations spreading across the desert. Third time up and I'm sure I'll be back again." - Christopher, Jul 15, 2012
"As my first 'high altitude' (not sea level, lol) I struggled, after a very long day, to reach Williamson's Summit. The sweep wouldn't let me give up--and I learned a valuable lesson!" - Mountain-Rain, Jul 24, 2010
"Disaster with the Sierra Club led trip. Was supposed to climb Islip but there was too much snow. Went to Williamson instead but had same problem at the top and couldn't find way down. 8 hour hike." - srphilip, May 16, 1992



Nearest peaks