It depends on where in the Bay Area you are, but barring horrible traffic going out or a horrible wait at the Yosemite entrance station if you go up Tioga Road, you should be able to get to Lone Pine within about 7 hours driving time. This does not include stopping time. If you are coming from the East Bay, go over Tioga Road, have no wait at the entrance station, and drive at least 5 MPH above the speed limit the whole way, you will do it in less than 7 hours driving time, but I wouldn't count on it.