Hi,
I looked for him in findagrave.com and all of the Sierrra county cemeteries listed at Interment.net but didn't find him in any. Maybe he had a temporary marker which wasn't replaced with a permanent marker.
The Sierra County Genealogical Society, rootsweb.ancestry.com/nmscgs2/cj=l&netid=cj&o_xi... might have additional information and/or his obituary. Successful Searching!