He's a frequent poster on another forum I visit, and he's been gone for a while. If you've been in the Sierra in the vicinity of Taboose Pass, Split Mountain, Pinchot Pass, or anywhere in the area, and saw him or someone who might have been him - give SEKI a call.

http://www.nps.gov/seki/parknews/upload/FLYER-LAWRENCE-CONN-OVERDUE-HIKER-Oct-24-2012.pdf
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