I'm older, but in good cycling condition for my age; not frail, overweight or infirm in any way. I returned to cycling a couple of years ago and commute 10 miles a day to get to work, at a pretty good pace. I used to tour quite a bit and I know how to pace myself and negotiate traffic.
I'd like to venture a little farther some long weekend soon - take Bart to the Richmond station, leaving home early in the morning, then wend my way up to the wine country, using the bike lane on the new bridge span, stay in a hotel for a day or two -; tour around a bit and retrace the path. Does that sound do-able to you knowledgeable regional touring cyclists ?
I'm patient, careful, and don't expect the ride to be free of traffic; I expect it will be a bit unpleasant in stretches. Sound OK? I'd do it while long daylight hours prevail.