Walt:
This hike is one of the four primary routes to Mt. Baldy (official name: Mt. San Antonio).
The primary routes are (in order of difficulty):
1. Baldy Notch to Mt. Baldy.
2. Ski Hut Trail to Mt. Baldy.
3. Pine Mtn. to Dawson Pk to Mt. Baldy.
4. Baldy Village to Mt. Baldy (Bear Canyon route)
This route, via Pine Mtn., is the least used route. This route starts from the North on Blue Ridge which is above Wrightwood, CA. If you decide to do this route, be aware that Hwy 138 is closed and that you must use Lone Pine Canyon Rd. to access Wrightwood. See driving directions, here:
http://maps.google.com/maps?f=d&hl=en&g ... &z=10&om=1
This route is in remote, relatively untravelled country. You'll see a lot of sheep trails. I have seen more Big Horn Sheep in this area than in any other in Southern California.
As I mentioned, you start on Blue Ridge, here:
http://www.topozone.com/map.asp?lat=34. ... &layer=DRG
Then it ascends Pine Mtn, here:
http://www.topozone.com/map.asp?lat=34. ... &layer=DRG (you have to do a short bit of off trail to gain the summit).
Then it descends

and reascends the next peak, Dawson Pk, here:
http://www.topozone.com/map.asp?lat=34. ... &layer=DRG
Now, you're going to really lose some elevation, descending to the saddle between Dawson and Baldy, here:
http://www.topozone.com/map.asp?lat=34. ... &layer=DRG The topo shows the trail going slightly East of the saddle. I don't recall that being true. You want to go to the geographic saddle.
From the Dawson-Baldy saddle, you then ascend Mt Baldy, here:
http://www.topozone.com/map.asp?lat=34. ... &layer=DRG a Southern Californa 10k+ summit, one of only about 25 total peaks above 10k in S. Cal. The stretch from Dawson-Baldy saddle is quite steep.
This route is "only" 10 miles RT,
BUT one has to hike all the way back. Overall, I'd say this is one tough trip although probably not of Skyline's difficulty. One is rewarded with great desert, mountain, and urban views and lots of solitude, particularly mid-week. No water anywhere en route; bring what you'll need.
John Robinson's book,
Trails of the Angeles has an excellent write up of the trip.