Reviving this thread..
CA-39 to Dawson Saddle
22.5 miles long (parking near West Fork)
Starting elevation: 1600 ft
Ending elevation: 7901 ft
Elevation gain: 6300 ft
5.3% average grade (5.6% for the 39 section)
My ride report can be found here:
http://www.toughascent.com/blog/?p=152.