I'll be attending a conference in the SF Bay area (Livermore, specifically) in early October, right before the Columbus day long weekend (10/9 - 11). Since my flight will be paid for, I'd like to take the opportunity to get out and do something, especially since I've never before gotten out in the CA mountains.
What are viable solo hiking/mountaineering objectives for that time of year, and not too far (within 6 hrs drive?) from where I'll be? Is Shasta doable then? Should I just head to Yosemite? Will there be any climbs in season in the Sierra? Would anybody want to partner up and show me around?