This seems to be a great website for Sonora Pass (and environs) information:
November 5, 2014, Highway 108 is OPEN again after the latest storm.
With changing conditions, it is best to check with Caltrans for the most up to date situation on the roads. Call 1-800.427.7623 or visit the CalTrans website: CalTrans – Department of Transportation – Road Conditions. (Scroll down to SR 108.)
Sonora Pass usually remains open until the first heavy snowfall of the winter arrives. Often that occurs sometime in early November, but snow can temporarily close the pass at any time.
Traditionally the pass re-opens in mid-May, but once again, even after it opens, late season storms can cause it to close again. See the past opening dates shown below: Historical Conditions.
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