trip report by site editor Rick McCharles
Mount San Antonio, commonly known as Old Baldy or Mt Baldy, at 10,068 ft (3,069 m), is the highest peak in the San Gabriel Mountains, and the highest point in Los Angeles County. …
Hiking trails access the summit from three sides of the mountain and one route is assisted on summer weekends by the availability of a running ski-area chair lift …
I checked Modern Hiker for details:
– Distance: 10.33 miles
– Elevation Gain: 3950 feet
… Most of the trails are very clearly marked and easy to follow. There are a few places where you might get off the beaten path, but generally you can find your way back with ease. The Devil’s Backbone Trail has a few dangerous spots that deserve extra attention. Do not attempt this trail when there is ice or snow present. A single slip on the Backbone when it’s icy could spell serious trouble …
I was concerned about snow on May 5th, 2011. People have died here.
I was ready to switch to a safer trail, if advised to do so at the Visitor’s Center. … Unfortunately, due to budget cuts, the office is currently closed Tue/Wed/Thur. (I arrived on a Thursday. Merde.)
… I decided to climb as high as possible, turning back if unsafe.
The most popular trailhead for those not CHEATING by taking the lift is Manker Flats, Antonio Falls road. It’s relatively easy to get up to Mt. Baldy Ski Resort, (not to be confused with the one in Canada).
The weather was perfect. Very little wind.
The highlight for me, though, were the ridge walk sections. Happily, all clear of snow.
Conditions were safe. I found myself on the summit in 3hrs.
I’m not saying there was no snow. Rather that there was almost no snow in any position of exposure.
I stashed a Summit Stone at 10,064 feet. (PHOTO)
This hike is highly recommended. I loved it.
A much better trip report than mine is posted on Modern Hiker. 🙂
besthike.com 
Great summit Rick! Wonderful new home as well for that little cobblestone too.
DSD